请问：如何将picture控件中的东西保存为bmp文件？

[三炮]

static类的getbitmap()只能得到句柄

[三炮]

to lixiaosan(小三) :
我运行了你给的代码，只能保存我开始给picture控件的bitmap，而我后来画的线段没有被保存下来。
我想保存后来画的曲线，是不是不能这样弄，或者用截屏的方法？

[快乐鹦鹉]

要保存到文件，当然首先要得到句柄。然后可以转成CBitmap对象。再保存到bmp文件。最后一个过程，我想网上是有现成文章的。

[lixiaosan]

BOOL SaveBmp(HBITMAP hBitmap, CString FileName)

{

HDC hDC;

int iBits;

WORD wBitCount;

DWORD dwPaletteSize=0, dwBmBitsSize=0, dwDIBSize=0, dwWritten=0;

BITMAP Bitmap;

BITMAPFILEHEADER bmfHdr;

BITMAPINFOHEADER bi;

LPBITMAPINFOHEADER lpbi;

HANDLE fh, hDib, hPal,hOldPal=NULL;



hDC = CreateDC("DISPLAY", NULL, NULL, NULL);

iBits = GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES);

DeleteDC(hDC);

if (iBits <= 1) wBitCount = 1;

else if (iBits <= 4) wBitCount = 4;

else if (iBits <= 8) wBitCount = 8;

else wBitCount = 24;



GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap);

bi.biSize = sizeof(BITMAPINFOHEADER);

bi.biWidth = Bitmap.bmWidth;

bi.biHeight = Bitmap.bmHeight;

bi.biPlanes = 1;

bi.biBitCount = wBitCount;

bi.biCompression = BI_RGB;

bi.biSizeImage = 0;

bi.biXPelsPerMeter = 0;

bi.biYPelsPerMeter = 0;

bi.biClrImportant = 0;

bi.biClrUsed = 0;



dwBmBitsSize = ((Bitmap.bmWidth * wBitCount + 31) / 32) * 4 * Bitmap.bmHeight;



hDib = GlobalAlloc(GHND,dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER));

lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);

*lpbi = bi;



hPal = GetStockObject(DEFAULT_PALETTE);

if (hPal)

{

hDC = ::GetDC(NULL);

hOldPal = ::SelectPalette(hDC, (HPALETTE)hPal, FALSE);

RealizePalette(hDC);

}



GetDIBits(hDC, hBitmap, 0, (UINT) Bitmap.bmHeight, (LPSTR)lpbi + sizeof(BITMAPINFOHEADER)

+dwPaletteSize, (BITMAPINFO *)lpbi, DIB_RGB_COLORS);



if (hOldPal)

{

::SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);

RealizePalette(hDC);

::ReleaseDC(NULL, hDC);

}



fh = CreateFile(FileName, GENERIC_WRITE,0, NULL, CREATE_ALWAYS,

FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);



if (fh == INVALID_HANDLE_VALUE) return FALSE;



bmfHdr.bfType = 0x4D42; // "BM"

dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;

bmfHdr.bfSize = dwDIBSize;

bmfHdr.bfReserved1 = 0;

bmfHdr.bfReserved2 = 0;

bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER) + dwPaletteSize;



WriteFile(fh, (LPSTR)&bmfHdr, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);

WriteFile(fh, (LPSTR)lpbi, dwDIBSize, &dwWritten, NULL);



GlobalUnlock(hDib);

GlobalFree(hDib);

CloseHandle(fh);



return TRUE;



}

[快乐鹦鹉]

小三这个图片的程序卖的不错阿