一、要把文本和图形保存到位图文件，只要对掌握位图结构有一定的了解，一切都ok呢。先必须要创建内存设备环境，然后内存设备环境创建的DIB区域，别忘了还要创建个CBitmap对象，CBitmap对象必须和DIB区域关联起来，把CBitmap对象选择到当前设备环境，然后在当前设备环境输出文本和图形就可以了。
二、具体实现代码如下
void CTestSaveBmpView::SaveAsBmp(CString filename)
{
//定义图形大小
int iWidth = 800;
int iHeight = 600;
int iPixel = 16;
//图形格式参数
LPBITMAPINFO lpbmih = new BITMAPINFO;
lpbmih->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
lpbmih->bmiHeader.biWidth = iWidth;
lpbmih->bmiHeader.biHeight = iHeight;
lpbmih->bmiHeader.biPlanes = 1;
lpbmih->bmiHeader.biBitCount = iPixel;
lpbmih->bmiHeader.biCompression = BI_RGB;
lpbmih->bmiHeader.biSizeImage = 0;
lpbmih->bmiHeader.biXPelsPerMeter = 0;
lpbmih->bmiHeader.biYPelsPerMeter = 0;
lpbmih->bmiHeader.biClrUsed = 0;
lpbmih->bmiHeader.biClrImportant = 0;
//创建位图数据
HDC hdc,hdcMem;
HBITMAP hBitMap = NULL;
CBitmap *pBitMap = NULL;
CDC *pMemDC = NULL;
BYTE *pBits;
hdc = CreateIC(TEXT("DISPLAY"),NULL,NULL,NULL);
hdcMem = CreateCompatibleDC(hdc);
hBitMap = CreateDIBSection(hdcMem,lpbmih,DIB_PAL_COLORS,(void **)&pBits,NULL,0);
pBitMap = new CBitmap;
pBitMap->Attach(hBitMap);
pMemDC = new CDC;
pMemDC->Attach(hdcMem);
pMemDC->SelectObject(pBitMap);
//添加自绘图形
CRect rc(0,0,iWidth,iHeight);
pMemDC->SetBkMode(TRANSPARENT);
DrawCurve(pMemDC,rc);
//保存到文件并创建位图结构
BITMAPFILEHEADER bmfh;
ZeroMemory(&bmfh,sizeof(BITMAPFILEHEADER));
*((char *)&bmfh.bfType) = ''B'';
*(((char *)&bmfh.bfType) + 1) = ''M'';
bmfh.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
bmfh.bfSize = bmfh.bfOffBits + (iWidth * iHeight) * iPixel / 8;
TCHAR szBMPFileName[128];
int iBMPBytes = iWidth * iHeight * iPixel / 8;
strcpy(szBMPFileName,filename);
CFile file;
if(file.Open(szBMPFileName,CFile::modeWrite | CFile::modeCreate))
{
file.Write(&bmfh,sizeof(BITMAPFILEHEADER));
file.Write(&(lpbmih->bmiHeader),sizeof(BITMAPINFOHEADER));
file.Write(pBits,iBMPBytes);
file.Close();
}
pMemDC->DeleteDC();
delete pMemDC; pMemDC = NULL;
delete pBitMap; pBitMap = NULL;
delete lpbmih; lpbmih = NULL;
}
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