我试图写一个简单的位图大小调整应用程序使用窗口API，这是我的位图大小调整功能：

BOOL ResizeBitmap(HBITMAP hOriginalBitmap, const char resizedFilename[], BitmapAngle NewAngle, BitmapAngle BmAngle){
    HDC hdcSrc = CreateCompatibleDC(NULL);
    HGDIOBJ originalObject = SelectObject(hdcSrc, hOriginalBitmap);
    HDC hdcDest = CreateCompatibleDC(NULL);
    HBITMAP hNewBitmap = CreateCompatibleBitmap(hdcDest, NewAngle.Width, NewAngle.Height);
    if (!hNewBitmap) {
        GetErrorCode("CreateCompatibleBitmap");
        ExitProcess(0);
    }
    SelectObject(hdcDest, hNewBitmap);
    // Set the stretch mode to HALFTONE for better quality
    SetStretchBltMode(hdcDest, HALFTONE);
    SetBrushOrgEx(hdcDest, 0, 0, NULL);
    // Use StretchBlt to resize the original bitmap onto the new bitmap
    StretchBlt(hdcDest, 0, 0, NewAngle.Width, NewAngle.Height,
               hdcSrc, 0, 0, BmAngle.Width, BmAngle.Height,
               SRCCOPY);
    // BitBlt(hdcDest, 0, 0, NewAngle.Width, NewAngle.Height, hdcSrc, 0, 0, SRCCOPY);
    // Save the resized bitmap to a file
    SaveBitmapToFile(hNewBitmap, NewAngle, resizedFilename);
    SelectObject(hdcSrc, originalObject);
    DeleteDC(hdcSrc);
    DeleteDC(hdcDest);
    DeleteObject(hNewBitmap);
    return TRUE;
}

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这是我的SaveBitmapToFile函数：

BOOL SaveBitmapToFile(HBITMAP hBitMap, BitmapAngle Angle, const char NewFileName[]) {
    HDC hDevice = CreateCompatibleDC(NULL);
    SelectObject(hDevice, hBitMap);
    BITMAPINFOHEADER BitmapInfoHeader = GetBitmapInfoHeader(Angle);
    BITMAPFILEHEADER BitMapFileHeader = GetBitmapFileHeader(Angle);
    DWORD AllocatedSize = Angle.Width * Angle.Height * 3;  // Assuming 24 bits per pixel
    BYTE* BitmapData = VirtualAlloc(NULL, AllocatedSize, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
    int Result = GetDIBits(hDevice, hBitMap, 0, Angle.Height, BitmapData, (BITMAPINFO*)&BitmapInfoHeader, DIB_RGB_COLORS);
    if (!Result) {
        GetErrorCode("GetDIBits");
        ExitProcess(0);
    }
    HANDLE hFile = CreateFileA(NewFileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
    if (!hFile) {
        GetErrorCode("CreateFileA");
        ExitProcess(0);
    }
    // Write headers and bitmap data to the file
    WriteFile(hFile, &BitMapFileHeader, sizeof(BITMAPFILEHEADER), NULL, NULL);
    WriteFile(hFile, &BitmapInfoHeader, sizeof(BITMAPINFOHEADER), NULL, NULL);
    WriteFile(hFile, BitmapData, AllocatedSize, NULL, NULL);
    CloseHandle(hFile);
    VirtualFree(BitmapData, AllocatedSize, MEM_RELEASE);
    DeleteDC(hDevice);
    if (!GetLastError()) {
        return TRUE;
    } else {
        GetErrorCode("SaveBitmapToFile");
        return FALSE;
    }
}

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然而，结果位图文件看起来真的很奇怪，它只是一个带有白色点的位图：
The input bitmapThe Output bitmap的数据库
SaveBitmapToFile函数工作得很好，当我尝试截图时，所以我认为问题出在ResizeBitmap函数上
这是我的截图功能，它工作得很好。

HBITMAP GetScreenBitmap() {
    HDC hdcScreen = GetDC(NULL);
    int screenWidth = GetSystemMetrics(SM_CXSCREEN);
    int screenHeight = GetSystemMetrics(SM_CYSCREEN);
    // Create a compatible memory DC using the screen DC
    HDC hdcMem = CreateCompatibleDC(hdcScreen);
    // Create a compatible bitmap using the screen DC
    HBITMAP hBitmap = CreateCompatibleBitmap(hdcScreen, screenWidth, screenHeight);
    // Select the bitmap into the memory DC
    SelectObject(hdcMem, hBitmap);
    // BitBlt to copy the contents of the screen to the memory DC
    BitBlt(hdcMem, 0, 0, screenWidth, screenHeight, hdcScreen, 0, 0, SRCCOPY);
    // Release resources
    ReleaseDC(NULL, hdcScreen);
    DeleteDC(hdcMem);
    return hBitmap;
}
HBITMAP hCurrentScreen = GetScreenBitmap();
BitmapAngle BmAngle; BmAngle.Height = GetSystemMetrics(SM_CYSCREEN); BmAngle.Width = GetSystemMetrics(SM_CXSCREEN);
SaveBitmapToFile(hCurrentScreen, BmAngle, "TEST.bmp");

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