为什么用Windows SDK编程不行？

[dawner]

用Windows MFC编程可以轻易地实现不规则窗口，可为什么用Windows SDK编程实现不规则窗口却那么难，是不是用Windows SDK不能实现呀？有没有人实现过？有的话还请详告！有这方面例子的朋友最好能给我发一个([e-mail])，让我学习学习，谢谢各位的参与！

[cghao]

SDK完全可以

[cghao]

HRGN BitmapToRegion (HBITMAP hBmp, COLORREF cTransparentColor,
COLORREF cTolerance)
{
HRGN hRgn = NULL;
if (hBmp)
{
// Create a memory DC inside which we will scan the bitmap content
HDC hMemDC = ::CreateCompatibleDC(NULL);
if (hMemDC)
{
// Get bitmap size
BITMAP bm;
::GetObject(hBmp, sizeof(bm), &bm);

// Create a 32 bits depth bitmap and select it into the memory DC
BITMAPINFOHEADER RGB32BITSBITMAPINFO = {
sizeof(BITMAPINFOHEADER), // biSize
bm.bmWidth, // biWidth;
bm.bmHeight, // biHeight;
1, // biPlanes;
32, // biBitCount
BI_RGB, // biCompression;
0, // biSizeImage;
0, // biXPelsPerMeter;
0, // biYPelsPerMeter;
0, // biClrUsed;
0 // biClrImportant;
};
VOID * pbits32;
HBITMAP hbm32 = ::CreateDIBSection(hMemDC, (BITMAPINFO *)&RGB32BITSBITMAPINFO, DIB_RGB_COLORS, &pbits32, NULL, 0);
if (hbm32)
{
HBITMAP holdBmp = (HBITMAP)::SelectObject(hMemDC, hbm32);

// Create a DC just to copy the bitmap into the memory DC
HDC hDC = ::CreateCompatibleDC(hMemDC);
if (hDC)
{
// Get how many bytes per row we have for the bitmap bits (rounded up to 32 bits)
BITMAP bm32;
::GetObject(hbm32, sizeof(bm32), &bm32);
while (bm32.bmWidthBytes % 4)
bm32.bmWidthBytes++;

// Copy the bitmap into the memory DC
HBITMAP holdBmp = (HBITMAP)::SelectObject(hDC, hBmp);
::BitBlt(hMemDC, 0, 0, bm.bmWidth, bm.bmHeight, hDC, 0, 0, SRCCOPY);

// For better performances, we will use the ExtCreateRegion() function to create the
// region. This function take a RGNDATA structure on entry. We will add rectangles by
// amount of ALLOC_UNIT number in this structure.
#define ALLOC_UNIT 100
DWORD maxRects = ALLOC_UNIT;
HANDLE hData = ::GlobalAlloc(GMEM_MOVEABLE, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects));
RGNDATA *pData = (RGNDATA *)::GlobalLock(hData);
pData->rdh.dwSize = sizeof(RGNDATAHEADER);
pData->rdh.iType = RDH_RECTANGLES;
pData->rdh.nCount = pData->rdh.nRgnSize = 0;
::SetRect(&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);

// Keep on hand highest and lowest values for the "transparent" pixels
BYTE lr = GetRValue(cTransparentColor);
BYTE lg = GetGValue(cTransparentColor);
BYTE lb = GetBValue(cTransparentColor);
BYTE hr = min(0xff, lr + GetRValue(cTolerance));
BYTE hg = min(0xff, lg + GetGValue(cTolerance));
BYTE hb = min(0xff, lb + GetBValue(cTolerance));

// Scan each bitmap row from bottom to top (the bitmap is inverted vertically)
BYTE *p32 = (BYTE *)bm32.bmBits + (bm32.bmHeight - 1) * bm32.bmWidthBytes;
for (int y = 0; y < bm.bmHeight; y++)
{
// Scan each bitmap pixel from left to right
for (int x = 0; x < bm.bmWidth; x++)
{
// Search for a continuous range of "non transparent pixels"
int x0 = x;
LONG *p = (LONG *)p32 + x;
while (x < bm.bmWidth)
{
BYTE b = GetRValue(*p);
if (b >= lr && b <= hr)
{
b = GetGValue(*p);
if (b >= lg && b <= hg)
{
b = GetBValue(*p);
if (b >= lb && b <= hb)
// This pixel is "transparent"
break;
}
}
p++;
x++;
}

if (x > x0)
{
// Add the pixels (x0, y) to (x, y+1) as a new rectangle in the region
if (pData->rdh.nCount >= maxRects)
{
::GlobalUnlock(hData);
maxRects += ALLOC_UNIT;
hData = ::GlobalReAlloc(hData, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), GMEM_MOVEABLE);
pData = (RGNDATA *)::GlobalLock(hData);
}
RECT *pr = (RECT *)&pData->Buffer;
::SetRect(&pr[pData->rdh.nCount], x0, y, x, y+1);
if (x0 < pData->rdh.rcBound.left)
pData->rdh.rcBound.left = x0;
if (y < pData->rdh.rcBound.top)
pData->rdh.rcBound.top = y;
if (x > pData->rdh.rcBound.right)
pData->rdh.rcBound.right = x;
if (y+1 > pData->rdh.rcBound.bottom)
pData->rdh.rcBound.bottom = y+1;
pData->rdh.nCount++;

// On Windows98, ExtCreateRegion() may fail if the number of rectangles is too
// large (ie: > 4000). Therefore, we have to create the region by multiple steps.
if (pData->rdh.nCount == 2000)
{
HRGN h = ::ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
if (hRgn)
{
::CombineRgn(hRgn, hRgn, h, RGN_OR);
::DeleteObject(h);
}
else
hRgn = h;
pData->rdh.nCount = 0;
::SetRect(&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);
}
}
}

// Go to next row (remember, the bitmap is inverted vertically)
p32 -= bm32.bmWidthBytes;
}

// Create or extend the region with the remaining rectangles
HRGN h = ::ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
if (hRgn)
{
::CombineRgn(hRgn, hRgn, h, RGN_OR);
::DeleteObject(h);
}
else
hRgn = h;

// Clean up
::GlobalFree(hData);
::SelectObject(hDC, holdBmp);
::DeleteDC(hDC);
}

::DeleteObject(::SelectObject(hMemDC, holdBmp));
}

::DeleteDC(hMemDC);
}
}

return hRgn;
}
HBITMAP hbmp=(HBITMAP)::LoadImage(hInst,"start.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);
::SetWindowRgn(hWnd,BitmapToRegion(hbmp,RGB(255,255,255),
RGB(0,0,0)),TRUE);

[NullSpeed]

Windows MFC 内部调用了Windows SDK内容！

[dawner]

能不能把你的源程序发给我看，在这里看很费劲，我的E-mail:[e-mail]

[何哀何欢]

SetWindowRgn(.....);

[windz]

查API，有这样的函数 ：）

[hwndhwnd]

MFC行的SDK都行。SDK行的MFC就不一定了。

[jedyking]

去http://www.appspeed.com下载SkinMagic SDK for VC，可是做出你要的界面来

[dawner]

非常感谢各位的参与，我的问题已经经cghao(春光）的帮助解决，在此感谢cghao(春光）！