GetThumbnailImage

獲得縮略圖;

Image *GetThumbnailImage(

UINT thumbWidth, //寬度(像素)

UINT thumbHeight, //高度(像素)

GetThumbnailImageAbort callback,

VOID *callbackData);

callback 可選。您提供的回調函式。在創建或檢索的縮略圖圖像處理，微軟Windows GDI +中調用該函式，讓您有機會中止這一進程。默認值是NULL。

callbackData 可選。指針指向的記憶體塊，它包含要由回調函式使用的數據。默認值是NULL

MSDN 例子

VOID Example_GetThumbnail(HDC hdc)

{

Graphics graphics(hdc);

// Create an image and a thumbnail of the image.

Image image(L"Crayons.jpg");

Image* pThumbnail = image.GetThumbnailImage(40, 40, NULL, NULL);

// Draw the original and the thumbnail images.

graphics.DrawImage(&image, 10, 10, image.GetWidth(), image.GetHeight());

graphics.DrawImage(

pThumbnail,

150,

10,

pThumbnail->GetWidth(),

pThumbnail->GetHeight());

delete pThumbnail;

}