如何用VC创建一个24位的位图？？？

[phlx]

如何用VC++创建1个24位的位图呢？CBitmap,CImage都只能创建16位以下，无法创建24位图像。

请问各位高手怎样才能创建一个24位的位图呢？

[niejx]

可以参照BMP文件结构
包括三个部分
应该很简单的

[wrcluomo]

void CMainFrame::OnFileNewBmp()
{
this->SendMessage(WM_COMMAND,ID_FILE_NEW);
CCh1_1Doc* pDoc=(CCh1_1Doc*) MDIGetActive()->GetActiveView()->GetDocument();
HDIB hNewDIB;
char * upNewBMP;
LPBITMAPINFOHEADER lpBI;
hNewDIB = (HDIB) ::GlobalAlloc(GHND,768*576*3+40);
upNewBMP=( char * )::GlobalLock(hNewDIB);
lpBI=(LPBITMAPINFOHEADER)upNewBMP;
lpBI->biSize=40;
lpBI->biPlanes=1;
lpBI->biBitCount=0;
lpBI->biWidth=768;
lpBI->biHeight=576;
lpBI->biBitCount=24;
lpBI->biSizeImage=768*576*3;
::GlobalUnlock(hNewDIB);
memset(FindDIBBits(upNewBMP),255,::GlobalSize(hNewDIB)-40);
CSize size;
size=pDoc->GetDocSize();
pDoc->ReplaceHDIB(hNewDIB);
pDoc->InitDIBData();
((CCh1_1View *) MDIGetActive()->GetActiveView())->OnInitialUpdate();

}

[jyc_nj]

HBITMAP CreateDIB(int nWidth, int nHeight)
{
BITMAPINFO bmpInfo;
memset(&bmpInfo, 0, sizeof(BITMAPINFO));
bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmpInfo.bmiHeader.biWidth = nWidth;
bmpInfo.bmiHeader.biHeight = nHeight;
bmpInfo.bmiHeader.biPlanes = 1;
bmpInfo.bmiHeader.biBitCount = 24 ;
bmpInfo.bmiHeader.biCompression = BI_RGB;

CDC MemDC;
MemDC.CreateCompatibleDC(NULL);
HBITMAP hBmp;
void *lpBits;
hBmp = ::CreateDIBSection( MemDC, &bmpInfo, DIB_RGB_COLORS, reinterpret_cast<void **>(&lpBits), NULL, 0);
return hBmp;
}