谁可以帮我瞧瞧两个函数中DC释放的错误？急
有两个要求:
在所有GetDC()和ReleaseDC()的地方，用CClientDC
在所有CreateXXXDC和DeleteDC的地方，用CDC。
求大神帮忙修改，分数都给大家了
void Shadow::DrawSemiTransparentRect(CDC *pDstDC, CRect rtTran, COLORREF clrSrc)
{
int nSavedDC = pDstDC->SaveDC();
int nWidth = rtTran.Width();
int nHeight = rtTran.Height();
CDC bmpDC;
bmpDC.CreateCompatibleDC(pDstDC);
CBitmap bmp;
bmp.CreateCompatibleBitmap(pDstDC, nWidth, nHeight);
CBitmap* pOldBmp = (CBitmap*)bmpDC.SelectObject(&bmp);
bmpDC.BitBlt(0, 0, nWidth, nHeight, pDstDC, rtTran.left, rtTran.top, SRCCOPY);
HDC hDIBDC = CreateCompatibleDC(NULL);
BITMAPINFO hdr;
ZeroMemory(&hdr, sizeof(BITMAPINFO));
hdr.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
hdr.bmiHeader.biWidth = nWidth;
hdr.bmiHeader.biHeight = nHeight;
hdr.bmiHeader.biPlanes = 1;
hdr.bmiHeader.biBitCount = 32;
BYTE * pbtPixels = NULL;
HBITMAP hDIBitmap = CreateDIBSection(hDIBDC, (BITMAPINFO *)&hdr, DIB_RGB_COLORS, (void**)&pbtPixels, NULL, 0);
HBITMAP hOldBmp = (HBITMAP)SelectObject(hDIBDC, hDIBitmap);
BitBlt(hDIBDC, 0, 0, nWidth, nHeight, bmpDC.m_hDC, 0, 0, SRCCOPY);
SelectObject(hDIBDC, hOldBmp);
int nPixelSize = 4;
BYTE btSR = GetRValue(clrSrc);
BYTE btSG = GetGValue(clrSrc);
BYTE btSB = GetBValue(clrSrc);
for (int i = 0 ; i < nHeight ; i ++)
{
for (int j = 0 ; j < nWidth ; j ++)
{
BYTE btB = pbtPixels[i * nWidth * nPixelSize + j * nPixelSize ] ;
BYTE btG = pbtPixels[i * nWidth * nPixelSize + j * nPixelSize + 1 ] ;
BYTE btR = pbtPixels[i * nWidth * nPixelSize + j * nPixelSize + 2 ] ;
btB = (btSB + btB ) >> 1 ;
btG = (btSG + btG ) >> 1 ;
btR = (btSR + btR ) >> 1 ;
pbtPixels[i * nWidth * nPixelSize + j * nPixelSize ] = btB ;
pbtPixels[i * nWidth * nPixelSize + j * nPixelSize + 1 ] = btG ;
pbtPixels[i * nWidth * nPixelSize + j * nPixelSize + 2 ] = btR ;
}
}
SetDIBitsToDevice(pDstDC->GetSafeHdc(),rtTran.left,rtTran.top,nWidth,nHeight,
0,0,0,nHeight,(void*)pbtPixels,(BITMAPINFO*)&hdr,DIB_RGB_COLORS);
bmpDC.SelectObject(pOldBmp);
bmp.DeleteObject();
delete [] pbtPixels ;
bmpDC.DeleteDC();
DeleteObject(hDIBDC);
DeleteObject(hDIBitmap);
pDstDC->RestoreDC(nSavedDC);
pbtPixels=NULL;
pDstDC->RestoreDC(0);
}
HBITMAP Shadow::GetScreenHBITMAP()
{
HDC hScrDC = ::GetDC(NULL);
ASSERT(hScrDC);
HDC hMemDC = CreateCompatibleDC(hScrDC);
ASSERT(hMemDC);
int nWidth = GetSystemMetrics(SM_CXSCREEN);
int nHeight = GetSystemMetrics(SM_CYSCREEN);
HBITMAP hBitmap = CreateCompatibleBitmap(hScrDC, nWidth, nHeight);
HBITMAP hOldBitmap = (HBITMAP)SelectObject(hMemDC, hBitmap);
BitBlt(hMemDC, 0, 0, nWidth, nHeight, hScrDC, 0, 0, SRCCOPY);
hBitmap = (HBITMAP)SelectObject(hMemDC, hOldBitmap);
DeleteDC(hMemDC);
DeleteDC(hScrDC);
return hBitmap;
}
