代码参考了如下网页的实现：

https://www.cnblogs.com/zy791976083/p/9921069.html

整理成一个函数：

BOOL GetResGifSize(long nResId, LPCTSTR name, long *lnWidth, long *lnHeight)

{

    HRSRC hRsrc=FindResource(NULL, MAKEINTRESOURCE(nResId), name);if (NULL ==hRsrc) {returnFALSE;

    }



    DWORD dwSize=SizeofResource(NULL, hRsrc);

    HGLOBAL hGlobal=LoadResource(NULL, hRsrc);if (NULL ==hGlobal) {

        CloseHandle(hRsrc);returnFALSE;

    }



    unsignedchar* pBuffer = (unsigned char*)LockResource(hGlobal);if (NULL ==pBuffer) {

        CloseHandle(hRsrc);

        FreeResource(hGlobal);returnFALSE;

    }//判断是否为GIF文件
    if(pBuffer[0] != 0x47 && pBuffer[1] != 0x49 && pBuffer[2] != 0x46 && pBuffer[3] != 0x38){returnFALSE;

    }//读取宽高
    for(int i = 4; i < dwSize ; i++)

    {if(pBuffer[i] == 0x00 && pBuffer[i+1] == 0x2c)

        {*lnWidth = (pBuffer[i+7]<<8) | pBuffer[i+6];*lnHeight = (pBuffer[i+9]<<8) | pBuffer[i+8];

            UnlockResource(hGlobal);

            FreeResource(hGlobal);returnTRUE;

        }

    }



    UnlockResource(hGlobal);

    FreeResource(hGlobal);returnFALSE;

}

 

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