CreateBitmap到底怎么用的?100分

[darkread]

创建一个200x200内存Bitmap
底色为红色,
然后显示在窗体上.
能不能给个例子,或者说说我的程序问题在那里,我的程序现在的问题是什么都没有显示.
UCHAR * pb,pc;
int i;
HBITMAP hbmp;
pb =(UCHAR *) new UCHAR[604][200];
FillMemory(pb,604*200,0);
hbmp = CreateBitmap(201,200,1,24,pb);

HDC dc = ::GetDC(this->m_hWnd);
::ReleaseDC(this->GetSafeHwnd(),dc);
HDC hdc = ::CreateCompatibleDC(dc);
::SelectObject(hdc,hbmp);
BitBlt(dc,0,0,201,200,hdc,0,0,SRCCOPY);
::ReleaseDC(this->GetSafeHwnd(),dc);
DeleteDC(hdc);

[surstar]

1创建内存BITMAP
2创建内存DC，选进BITMAP
3画东西
4把内存DC BITBLT 到实际的DC上就OK了

[菜牛]

UCHAR * pb;
int nWidth, nHeight;
nWidth = 200;
int nByteWidth = (nWidth * 3 / 4) * 4;
nHeight = 200;
HBITMAP hbmp;
pb =(UCHAR *) new UCHAR[nByteWidth * nHeight * sizeof(COLORREF)];
FillMemory(pb,nByteWidth * nHeight * sizeof(COLORREF), 0);
hbmp = CreateBitmap(nWidth, nHeight, 1, 32, pb);

HDC dc = ::GetDC(this->m_hWnd);
// ::ReleaseDC(this->GetSafeHwnd(),dc);
HDC hdc = ::CreateCompatibleDC(dc);
HBITMAP hBmpOld = (HBITMAP)::SelectObject(hdc, hbmp);
BitBlt(dc, 0, 0, nWidth, nHeight, hdc, 0, 0, SRCCOPY);
::ReleaseDC(this->GetSafeHwnd(),dc);
::SelectObject(hBmpOld);
::DeleteObject(hbmp);
DeleteDC(hdc);
delete []pb;

[菜牛]

不过这样的位图是黑色的，除非你给各个点上色。

[Kudeet]

CreateBitmap(Width,Height,1,24,NULL);是设备不兼容的,就是不能BitBlt出来的,如果你的显示象素是24位的话,就用CreateCompatibleBitmap()

[xuzheng318]

This function creates a bitmap with the specified width, height, and bit depth.

HBITMAP CreateBitmap(
int nWidth,
int nHeight,
UINT cPlanes,
UINT cBitsPerPel,
CONST VOID *lpvBits
);

[darkread]

现在才发现,原来我在上面贴了一段垃圾,

[Practise_Think]

不是垃圾,只是你提前了将设备DC句柄释放了,所以就什么都没显示出来的原故!!

[darkread]

我照着上面各位高手的方法试试，发现确实，32bit的位图就是可以显示的,24bit的位图就是没有办法显示的。哎