我无法用"LoadImage"加载图片并在对话框中绘制它

Question

void CCreateList::paintRowList(CDialogEx* CCurent, int wBeginX, int wBeginY)
{
    CPaintDC dc(CCurent);
    CDC *cdc,cc;
    cdc=CCurent->GetDC();
    HANDLE hbitmap;
    hbitmap = LoadImage(0,L"C:\\PIC.png",IMAGE_BITMAP,100,100,0x00000010);
    cc.CreateCompatibleDC(cdc);
    cc.SelectObject(hbitmap);
    dc.BitBlt(100,100,100,100,&cc,0,0,SRCCOPY);
}

我想用对话框中的图像绘制标题.不要使用优化校准请帮帮我.

Answer 1

这是我用于加载其他图像格式的代码.它依赖于GDI +,所以你需要在使用它之前和之后进行初始化和关闭(每个程序就足够了)

加载例程:

// BMP, GIF, JPEG, PNG, TIFF, Exif, WMF, and EMF
HBITMAP mLoadImg(WCHAR *szFilename)
{
   HBITMAP result=NULL;

   Gdiplus::Bitmap* bitmap = new Gdiplus::Bitmap(szFilename,false);
   bitmap->GetHBITMAP(NULL, &result);
   delete bitmap;
   return result;
}

初始化/关机

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
   static Gdiplus::GdiplusStartupInput gdiplusStartupInput;
   static ULONG_PTR gdiplusToken;

    // so we can load all the image formats that windows supports natively - (I'm using a transparent PNG on the main dialog)
    GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

    // make things look pretty
    InitCommonControls();

    // run the app
    //DialogBox(hInstance, MAKEINTRESOURCE(DLG_MAIN), NULL, (DLGPROC)DialogProc);
    //
    // 
    //

    // clean-up stuff
    Gdiplus::GdiplusShutdown(gdiplusToken);

    return 0;
}

当然,这适用于基于对话框的应用程序(对话框在resource.rc中定义) - 而不是基于框架的应用程序或MFC框架.关键是,您只需在使用之前进行初始化,然后关闭.