Update-Installer/external/win32cpp/include/winutils.h
Robert Knight d16da069e9 Add Win++ library to external
This is a thin wrapper around the Win32 API used in the Win32
Updater Dialog implementation.
2011-08-23 19:54:52 +01:00

649 lines
20 KiB
C++

// Win32++ Version 7.2
// Released: 5th AUgust 2011
//
// David Nash
// email: dnash@bigpond.net.au
// url: https://sourceforge.net/projects/win32-framework
//
//
// Copyright (c) 2005-2011 David Nash
//
// Permission is hereby granted, free of charge, to
// any person obtaining a copy of this software and
// associated documentation files (the "Software"),
// to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify,
// merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom
// the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice
// shall be included in all copies or substantial portions
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.
//
////////////////////////////////////////////////////////
#ifndef _WIN32XX_WINUTILS_H_
#define _WIN32XX_WINUTILS_H_
// define useful macros from WindowsX.h
#ifndef GET_X_LPARAM
#define GET_X_LPARAM(lp) ((int)(short)LOWORD(lp))
#endif
#ifndef GET_Y_LPARAM
#define GET_Y_LPARAM(lp) ((int)(short)HIWORD(lp))
#endif
// Define our own MIN and MAX macros
// this avoids inconsistencies with Dev-C++ and other compilers, and
// avoids conflicts between typical min/max macros and std::min/std::max
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
namespace Win32xx
{
// Forward declarations
class CPoint;
class CRect;
CWinApp* GetApp();
void TRACE(LPCTSTR str);
/////////////////////////////////////////
// Definition of the CSize class
// This class can be used to replace the SIZE structure
class CSize : public SIZE
{
public:
CSize() { cx = 0; cy = 0; }
CSize(int CX, int CY) { cx = CX; cy = CY; }
CSize(SIZE sz) { cx = sz.cx; cy = sz.cy; }
CSize(POINT pt) { cx = pt.x; cy = pt.y; }
CSize(DWORD dw) { cx = (short)LOWORD(dw); cy = (short)HIWORD(dw); }
void SetSize(int CX, int CY) { cx = CX; cy = CY; }
// Operators
operator LPSIZE() { return this; }
BOOL operator == (SIZE sz) const { return (cx == sz.cx && cy == sz.cy); }
BOOL operator != (SIZE sz) const { return (cx != sz.cx || cy != sz.cy); }
void operator += (SIZE sz) { cx += sz.cx; cy += sz.cy; }
void operator -= (SIZE sz) { cx -= sz.cx; cy -= sz.cy; }
// Operators returning CSize
CSize operator - () const { return CSize (-cx, -cy); }
CSize operator + (SIZE sz) const { return CSize (cx + sz.cx, cy + sz.cy); }
CSize operator - (SIZE sz) const { return CSize (cx - sz.cx, cy - sz.cy); }
// Operators returning CPoint
CPoint operator + (POINT point) const;
CPoint operator - (POINT point) const;
// Operators returning CRect
CRect operator + (RECT rc) const;
CRect operator - (RECT rc) const;
};
/////////////////////////////////////////
// Definition of the CPoint class
// This class can be used to replace the POINT structure
class CPoint : public POINT
{
public:
CPoint() { x = 0; y = 0; }
CPoint(int X, int Y) { x = X; y = Y; }
CPoint(POINT pt) { x = pt.x ; y = pt.y; }
CPoint(POINTS pts) { x = pts.x; y = pts.y; }
CPoint(SIZE sz) { x = sz.cx; y = sz.cy; }
CPoint(DWORD dw) { x = (short) LOWORD(dw); y = (short) HIWORD(dw); }
void Offset(int dx, int dy) { x += dx; y += dy; }
void Offset(POINT pt) { x += pt.x; y += pt.y; }
void Offset(SIZE sz) { x += sz.cx; y += sz.cy; }
void SetPoint(int X, int Y) { x = X; y = Y; }
// Operators
operator LPPOINT() { return this; }
BOOL operator == (POINT pt) const { return ((x == pt.x) && (y == pt.y)); }
BOOL operator != (POINT pt) const { return ((x != pt.x) || (y != pt.y)); }
void operator += (SIZE sz) { x += sz.cx; y += sz.cy; }
void operator -= (SIZE sz) { x -= sz.cx; y -= sz.cy; }
void operator += (POINT pt) { x += pt.x; y += pt.y; }
void operator -= (POINT pt) { x -= pt.x; y -= pt.y; }
// Operators returning CPoint
CPoint operator - () const { return CPoint(-x, -y); }
CPoint operator + (SIZE sz) const { return CPoint(x + sz.cx, y + sz.cy); }
CPoint operator - (SIZE sz) const { return CPoint(x - sz.cx, y - sz.cy); }
CPoint operator + (POINT pt) const { return CPoint(x + pt.x, y + pt.y); }
CPoint operator - (POINT pt) const { return CPoint(x - pt.x, y - pt.y); }
// Operators returning CRect
CRect operator + (RECT rc) const;
CRect operator - (RECT rc) const;
};
/////////////////////////////////////////
// Definition of the CRect class
// This class can be used to replace the RECT structure.
class CRect : public RECT
{
public:
CRect() { left = top = right = bottom = 0; }
CRect(int l, int t, int r, int b) { left = l; top = t; right = r; bottom = b; }
CRect(RECT rc) { left = rc.left; top = rc.top; right = rc.right; bottom = rc.bottom; }
CRect(POINT pt, SIZE sz) { right = (left = pt.x) + sz.cx; bottom = (top = pt.y) + sz.cy; }
CRect(POINT topLeft, POINT bottomRight) { left = topLeft.x; top = topLeft.y; right = bottomRight.x; bottom = bottomRight.y; }
BOOL CopyRect(RECT rc) { return ::CopyRect(this, &rc); }
BOOL DeflateRect(int x, int y) { return ::InflateRect(this, -x, -y); }
BOOL DeflateRect(SIZE size) { return ::InflateRect(this, -size.cx, -size.cy); }
BOOL DeflateRect(RECT rc) { return ::InflateRect(this, rc.left - rc.right, rc.top - rc.bottom); }
BOOL DeflateRect(int l, int t, int r, int b){ return ::InflateRect(this, l - r, t - b); }
BOOL EqualRect(RECT rc) const { return ::EqualRect(&rc, this); }
BOOL InflateRect(int dx, int dy) { return ::InflateRect(this, dx, dy); }
BOOL InflateRect(SIZE sz) { return ::InflateRect(this, sz.cx, sz.cy); }
BOOL InflateRect(RECT rc) { return ::InflateRect(this, rc.right - rc.left, rc.bottom - rc.top); }
BOOL InflateRect(int l, int t, int r, int b){ return ::InflateRect(this, r - l, b - t); }
BOOL IntersectRect(RECT rc1, RECT rc2) { return ::IntersectRect(this, &rc1, &rc2); }
BOOL IsRectEmpty() const { return ::IsRectEmpty(this);}
BOOL IsRectNull() const { return (left == 0 && right == 0 && top == 0 && bottom == 0); }
CRect MulDiv(int nMult, int nDiv) const { return CRect ((left * nMult) / nDiv, (top * nMult) / nDiv,
(right * nMult) / nDiv, (bottom * nMult) / nDiv); }
void NormalizeRect() { int nTemp; if (left > right) { nTemp = left; left = right; right = nTemp; }
if (top > bottom) { nTemp = top; top = bottom; bottom = nTemp; } }
BOOL OffsetRect(int dx, int dy) { return ::OffsetRect(this, dx, dy); }
BOOL OffsetRect(POINT pt) { return ::OffsetRect(this, pt.x, pt.y); }
BOOL OffsetRect(SIZE size) { return ::OffsetRect(this, size.cx, size.cy); }
BOOL PtInRect(POINT pt) const { return ::PtInRect(this, pt); }
BOOL SetRect(int l, int t, int r, int b) { return ::SetRect(this, l, t, r, b); }
BOOL SetRect(POINT TopLeft, POINT BtmRight) { return ::SetRect(this, TopLeft.x, TopLeft.y, BtmRight.x, BtmRight.y); }
BOOL SetRectEmpty() { return ::SetRectEmpty(this); }
BOOL SubtractRect(RECT rc1, RECT rc2) { return ::SubtractRect(this, &rc1, &rc2); }
BOOL UnionRect(RECT rc1, RECT rc2) { return ::UnionRect(this, &rc1, &rc2); }
// Reposition rectangle
void MoveToX (int x) { right = Width() + x; left = x; }
void MoveToY (int y) { bottom = Height() + y; top = y; }
void MoveToXY (int x, int y) { MoveToX(x); MoveToY(y); }
void MoveToXY (POINT pt) { MoveToX (pt.x); MoveToY (pt.y); }
// Attributes
int Height() const { return bottom - top; }
int Width() const { return right - left; }
CSize Size() const { return CSize(Width(), Height()); }
CPoint CenterPoint() const { return CPoint((left + right) / 2, (top + bottom) / 2); }
CPoint TopLeft() const { return CPoint(left, top); }
CPoint BottomRight() const { return CPoint(right, bottom); }
// operators
operator LPRECT() { return this; }
BOOL operator == (RECT rc) const { return ::EqualRect(this, &rc); }
BOOL operator != (RECT rc) const { return !::EqualRect(this, &rc); }
void operator += (POINT pt) { ::OffsetRect(this, pt.x, pt.y); }
void operator += (SIZE size) { ::OffsetRect(this, size.cx, size.cy); }
void operator += (RECT rc) { ::InflateRect(this, rc.right - rc.left, rc.bottom - rc.top); }
void operator -= (RECT rc) { ::InflateRect(this, rc.left - rc.right, rc.top - rc.bottom); }
void operator -= (POINT pt) { ::OffsetRect(this, -pt.x, -pt.y); }
void operator -= (SIZE sz) { ::OffsetRect(this, -sz.cx, -sz.cy); }
void operator &= (RECT rc) { ::IntersectRect(this, this, &rc); }
void operator |= (RECT rc) { ::UnionRect(this, this, &rc); }
// Operators returning CRect
CRect operator + (POINT pt) const { CRect rc(*this); ::OffsetRect(&rc, pt.x, pt.y); return rc; }
CRect operator - (POINT pt) const { CRect rc(*this); ::OffsetRect(&rc, -pt.x, -pt.y); return rc; }
CRect operator + (SIZE sz) const { CRect rc(*this); ::OffsetRect(&rc, sz.cx, sz.cy); return rc; }
CRect operator - (SIZE sz) const { CRect rc(*this); ::OffsetRect(&rc, -sz.cx, -sz.cy); return rc; }
CRect operator + (RECT rc) const { CRect rc1(*this); rc1.InflateRect(rc); return rc1; }
CRect operator - (RECT rc) const { CRect rc1(*this); rc1.DeflateRect(rc); return rc1; }
CRect operator & (RECT rc) const { CRect rc1; ::IntersectRect(&rc1, this, &rc); return rc1; }
CRect operator | (RECT rc) const { CRect rc1; ::UnionRect(&rc1, this, &rc); return rc1; }
};
// CSize member function definitions
inline CPoint CSize::operator + (POINT pt) const { return CPoint(pt) + *this; }
inline CPoint CSize::operator - (POINT pt) const { return CPoint(pt) - *this; }
inline CRect CSize::operator + (RECT rc) const { return CRect(rc) + *this; }
inline CRect CSize::operator - (RECT rc) const { return CRect(rc) - *this; }
// CPoint member function definitions
inline CRect CPoint::operator + (RECT rc) const { return CRect(rc) + *this; }
inline CRect CPoint::operator - (RECT rc) const { return CRect(rc) - *this; }
////////////////////////////////////////////////////////
// Classes and functions (typedefs) for text conversions
//
// This section defines the following text conversions:
// A2BSTR ANSI to BSTR
// A2OLE ANSI to OLE
// A2T ANSI to TCHAR
// A2W ANSI to WCHAR
// OLE2A OLE to ANSI
// OLE2T OLE to TCHAR
// OLE2W OLE to WCHAR
// T2A TCHAR to ANSI
// T2BSTR TCHAR to BSTR
// T2OLE TCHAR to OLE
// T2W TCHAR to WCHAR
// W2A WCHAR to ANSI
// W2BSTR WCHAR to BSTR
// W2OLE WCHAR to OLE
// W2T WCHAR to TCHAR
// About different character and string types:
// ------------------------------------------
// char (or CHAR) character types are ANSI (8 bits).
// wchar_t (or WCHAR) character types are Unicode (16 bits).
// TCHAR characters are Unicode if the _UNICODE macro is defined, otherwise they are ANSI.
// BSTR (Basic String) is a type of string used in Visual Basic and COM programming.
// OLE is the same as WCHAR. It is used in Visual Basic and COM programming.
// Forward declarations of our classes. They are defined later.
class CA2A;
class CA2W;
class CW2A;
class CW2W;
class CA2BSTR;
class CW2BSTR;
// typedefs for the well known text conversions
typedef CA2W A2W;
typedef CW2A W2A;
typedef CW2BSTR W2BSTR;
typedef CA2BSTR A2BSTR;
typedef CW2A BSTR2A;
typedef CW2W BSTR2W;
#ifdef _UNICODE
typedef CA2W A2T;
typedef CW2A T2A;
typedef CW2W T2W;
typedef CW2W W2T;
typedef CW2BSTR T2BSTR;
typedef BSTR2W BSTR2T;
#else
typedef CA2A A2T;
typedef CA2A T2A;
typedef CA2W T2W;
typedef CW2A W2T;
typedef CA2BSTR T2BSTR;
typedef BSTR2A BSTR2T;
#endif
typedef A2W A2OLE;
typedef T2W T2OLE;
typedef CW2W W2OLE;
typedef W2A OLE2A;
typedef W2T OLE2T;
typedef CW2W OLE2W;
class CA2W
{
public:
CA2W(LPCSTR pStr) : m_pStr(pStr)
{
if (pStr)
{
// Resize the vector and assign null WCHAR to each element
int length = (int)strlen(pStr)+1;
m_vWideArray.assign(length, L'\0');
// Fill our vector with the converted WCHAR array
MultiByteToWideChar(CP_ACP, 0, pStr, -1, &m_vWideArray[0], length);
}
}
~CA2W() {}
operator LPCWSTR() { return m_pStr? &m_vWideArray[0] : NULL; }
operator LPOLESTR() { return m_pStr? (LPOLESTR)&m_vWideArray[0] : (LPOLESTR)NULL; }
operator LPBSTR() { return m_pStr? (LPBSTR)&m_vWideArray[0] : (LPBSTR)NULL; }
private:
CA2W(const CA2W&);
CA2W& operator= (const CA2W&);
std::vector<wchar_t> m_vWideArray;
LPCSTR m_pStr;
};
class CW2A
{
public:
CW2A(LPCWSTR pWStr) : m_pWStr(pWStr)
{
// Resize the vector and assign null char to each element
int length = (int)wcslen(pWStr)+1;
m_vAnsiArray.assign(length, '\0');
// Fill our vector with the converted char array
WideCharToMultiByte(CP_ACP, 0, pWStr, -1, &m_vAnsiArray[0], length, NULL,NULL);
}
~CW2A() {}
operator LPCSTR() { return m_pWStr? &m_vAnsiArray[0] : NULL; }
private:
CW2A(const CW2A&);
CW2A& operator= (const CW2A&);
std::vector<char> m_vAnsiArray;
LPCWSTR m_pWStr;
};
class CW2W
{
public:
CW2W(LPCWSTR pWStr) : m_pWStr(pWStr) {}
operator LPCWSTR() { return (LPWSTR)m_pWStr; }
operator LPOLESTR() { return (LPOLESTR)m_pWStr; }
private:
CW2W(const CW2W&);
CW2W& operator= (const CW2W&);
LPCWSTR m_pWStr;
};
class CA2A
{
public:
CA2A(LPCSTR pStr) : m_pStr(pStr) {}
operator LPCSTR() { return (LPSTR)m_pStr; }
private:
CA2A(const CA2A&);
CA2A& operator= (const CA2A&);
LPCSTR m_pStr;
};
class CW2BSTR
{
public:
CW2BSTR(LPCWSTR pWStr) { m_bstrString = ::SysAllocString(pWStr); }
~CW2BSTR() { ::SysFreeString(m_bstrString); }
operator BSTR() { return m_bstrString;}
private:
CW2BSTR(const CW2BSTR&);
CW2BSTR& operator= (const CW2BSTR&);
BSTR m_bstrString;
};
class CA2BSTR
{
public:
CA2BSTR(LPCSTR pStr) { m_bstrString = ::SysAllocString(A2W(pStr)); }
~CA2BSTR() { ::SysFreeString(m_bstrString); }
operator BSTR() { return m_bstrString;}
private:
CA2BSTR(const CA2BSTR&);
CA2BSTR& operator= (const CA2BSTR&);
BSTR m_bstrString;
};
////////////////////////////////////////
// Global Functions
//
inline CWnd* FromHandle(HWND hWnd)
// Returns the CWnd object associated with the window handle
{
assert( GetApp() );
CWnd* pWnd = GetApp()->GetCWndFromMap(hWnd);
if (::IsWindow(hWnd) && pWnd == 0)
{
GetApp()->AddTmpWnd(hWnd);
pWnd = GetApp()->GetCWndFromMap(hWnd);
::PostMessage(hWnd, UWM_CLEANUPTEMPS, 0, 0);
}
return pWnd;
}
inline CWinApp* GetApp()
// Returns a pointer to the CWinApp derrived class
{
return CWinApp::SetnGetThis();
}
inline CPoint GetCursorPos()
{
CPoint pt;
::GetCursorPos(&pt);
return pt;
}
inline HBITMAP LoadBitmap (LPCTSTR lpszName)
{
assert(GetApp());
HBITMAP hBitmap = (HBITMAP)::LoadImage (GetApp()->GetResourceHandle(), lpszName, IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR);
return hBitmap;
}
inline HBITMAP LoadBitmap (int nID)
{
return LoadBitmap(MAKEINTRESOURCE(nID));
}
inline void TRACE(LPCTSTR str)
// TRACE sends a string to the debug/output pane, or an external debugger
{
#ifdef _DEBUG
OutputDebugString(str);
#else
UNREFERENCED_PARAMETER(str); // no-op
#endif
}
#ifndef _WIN32_WCE // for Win32/64 operating systems, not WinCE
inline int GetWinVersion()
{
DWORD dwVersion = GetVersion();
int Platform = (dwVersion < 0x80000000)? 2:1;
int MajorVer = LOBYTE(LOWORD(dwVersion));
int MinorVer = HIBYTE(LOWORD(dwVersion));
int nVersion = 1000*Platform + 100*MajorVer + MinorVer;
// Return values and window versions:
// 1400 Windows 95
// 1410 Windows 98
// 1490 Windows ME
// 2400 Windows NT
// 2500 Windows 2000
// 2501 Windows XP
// 2502 Windows Server 2003
// 2600 Windows Vista and Windows Server 2008
// 2601 Windows 7
return nVersion;
}
inline int GetComCtlVersion()
{
// Load the Common Controls DLL
HMODULE hComCtl = ::LoadLibraryA("COMCTL32.DLL");
if (!hComCtl)
return 0;
int ComCtlVer = 400;
if (::GetProcAddress(hComCtl, "InitCommonControlsEx"))
{
// InitCommonControlsEx is unique to 4.7 and later
ComCtlVer = 470;
if (::GetProcAddress(hComCtl, "DllGetVersion"))
{
typedef HRESULT CALLBACK DLLGETVERSION(DLLVERSIONINFO*);
DLLGETVERSION* pfnDLLGetVersion = NULL;
pfnDLLGetVersion = (DLLGETVERSION*)::GetProcAddress(hComCtl, "DllGetVersion");
if(pfnDLLGetVersion)
{
DLLVERSIONINFO dvi;
dvi.cbSize = sizeof dvi;
if(NOERROR == pfnDLLGetVersion(&dvi))
{
DWORD dwVerMajor = dvi.dwMajorVersion;
DWORD dwVerMinor = dvi.dwMinorVersion;
ComCtlVer = 100 * dwVerMajor + dwVerMinor;
}
}
}
else if (::GetProcAddress(hComCtl, "InitializeFlatSB"))
ComCtlVer = 471; // InitializeFlatSB is unique to version 4.71
}
::FreeLibrary(hComCtl);
// return values and DLL versions
// 400 dll ver 4.00 Windows 95/Windows NT 4.0
// 470 dll ver 4.70 Internet Explorer 3.x
// 471 dll ver 4.71 Internet Explorer 4.0
// 472 dll ver 4.72 Internet Explorer 4.01 and Windows 98
// 580 dll ver 5.80 Internet Explorer 5
// 581 dll ver 5.81 Windows 2000 and Windows ME
// 582 dll ver 5.82 Windows XP or Vista without XP themes
// 600 dll ver 6.00 Windows XP with XP themes
// 610 dll ver 6.10 Windows Vista with XP themes
// 616 dll ver 6.16 Windows Vista SP1 or Windows 7 with XP themes
return ComCtlVer;
}
inline UINT GetSizeofMenuItemInfo()
{
UINT uSize = sizeof(MENUITEMINFO);
// For Win95 and NT, cbSize needs to be 44
if (1400 == (GetWinVersion()) || (2400 == GetWinVersion()))
uSize = 44;
return uSize;
}
inline UINT GetSizeofNonClientMetrics()
{
// This function correctly determines the sizeof NONCLIENTMETRICS
UINT uSize = sizeof (NONCLIENTMETRICS);
#if (WINVER >= 0x0600)
if (GetWinVersion() < 2600 && (uSize > 500)) // Is OS version less than Vista
uSize -= sizeof(int); // Adjust size back to correct value
#endif
return uSize;
}
// A global function to report the state of the left mouse button
inline BOOL IsLeftButtonDown()
{
SHORT state;
if (GetSystemMetrics(SM_SWAPBUTTON))
// Mouse buttons are swapped
state = GetAsyncKeyState(VK_RBUTTON);
else
// Mouse buttons are not swapped
state = GetAsyncKeyState(VK_LBUTTON);
// returns true if the left mouse button is down
return (state & 0x8000);
}
inline BOOL IsAeroThemed()
{
BOOL bIsAeroThemed = FALSE;
// Test if Windows version is XP or greater
if (GetWinVersion() >= 2501)
{
HMODULE hMod = ::LoadLibrary(_T("uxtheme.dll"));
if(hMod)
{
// Declare pointers to IsCompositionActive function
FARPROC pIsCompositionActive = ::GetProcAddress(hMod, "IsCompositionActive");
if(pIsCompositionActive)
{
if(pIsCompositionActive())
{
bIsAeroThemed = TRUE;
}
}
::FreeLibrary(hMod);
}
}
return bIsAeroThemed;
}
inline BOOL IsXPThemed()
{
BOOL bIsXPThemed = FALSE;
// Test if Windows version is XP or greater
if (GetWinVersion() >= 2501)
{
HMODULE hMod = ::LoadLibrary(_T("uxtheme.dll"));
if(hMod)
{
// Declare pointers to functions
FARPROC pIsAppThemed = ::GetProcAddress(hMod, "IsAppThemed");
FARPROC pIsThemeActive = ::GetProcAddress(hMod, "IsThemeActive");
if(pIsAppThemed && pIsThemeActive)
{
if(pIsAppThemed() && pIsThemeActive())
{
// Test if ComCtl32 dll used is version 6 or later
bIsXPThemed = (GetComCtlVersion() >= 600);
}
}
::FreeLibrary(hMod);
}
}
return bIsXPThemed;
}
#endif // #ifndef _WIN32_WCE
// Required for WinCE
#ifndef lstrcpyn
inline LPTSTR lstrcpyn(LPTSTR lpstrDest, LPCTSTR lpstrSrc, int nLength)
{
if(NULL == lpstrDest || NULL == lpstrSrc || nLength <= 0)
return NULL;
int nLen = MIN((int)lstrlen(lpstrSrc), nLength - 1);
LPTSTR lpstrRet = (LPTSTR)memcpy(lpstrDest, lpstrSrc, nLen * sizeof(TCHAR));
lpstrDest[nLen] = _T('\0');
return lpstrRet;
}
#endif // !lstrcpyn
}
#endif // _WIN32XX_WINUTILS_H_