我使用了以下程式碼來作抓圖 可是抓出來的圖只有全影像的1/4...
不知道該如何設定才可以抓到整個影像

LRESULT CALLBACK FrameCallBack( HWND hCapWnd, Longint lpvhdr )

{

LPVIDEOHDR VideoStr;

static BITMAPINFOHEADER BitmapHead;

static BITMAPINFO BitmapInfo;

static BITMAPFILEHEADER BitmapFileHead;

CAPSTATUS status;

int BIHsize, byte;

Byte *ptr;

TMemoryStream *stream = new TMemoryStream;

// 取得圖片資料

VideoStr=LPVIDEOHDR(lpvhdr);

// 取得CAP訊息

capGetStatus( hCapWnd, &status, sizeof(status) ) ;

// 取得圖片格式容量大小

BIHsize=capGetVideoFormatSize( hCapWnd );

// 取得圖片格式 代入 bitmapinfohead 內

capGetVideoFormat( hCapWnd, &BitmapHead, BIHsize);

// 設定 BITMAPINFO

BitmapInfo.bmiHeader=BitmapHead;



// 取得圖檔總容量

stream->Size=sizeof(BitmapFileHead) sizeof(BitmapHead) BitmapHead.biSizeImage-2;

//stream->Size=sizeof(BitmapFileHead) sizeof(BitmapHead) BitmapHead.biSizeImage;



// 設定 BITMAPFILEHEAD

BitmapFileHead.bfType=0x4D42; //總是 BM

BitmapFileHead.bfSize=stream->Size; //該圖檔總大小

//BitmapFileHead.bfOffBits=sizeof(BitmapFileHead) sizeof(BitmapHead); // 偏移至imagedata大小

BitmapFileHead.bfOffBits=sizeof(BitmapFileHead) sizeof(BitmapHead)-2; // 偏移至imagedata大小

//BitmapFileHead.bfOffBits=sizeof(BitmapFileHead) sizeof(BitmapHead); // 偏移至imagedata大小

// 將資料存入 memorystream

stream->Position=0;

stream->WriteBuffer( &BitmapFileHead, sizeof(BitmapFileHead) );

stream->WriteBuffer( &BitmapInfo, sizeof(BitmapInfo) );

stream->WriteBuffer( &BitmapFileHead.bfReserved1, sizeof(BitmapFileHead.bfReserved1) );

stream->WriteBuffer( &BitmapFileHead.bfReserved2, sizeof(BitmapFileHead.bfReserved2) );

stream->WriteBuffer( &BitmapFileHead.bfOffBits, sizeof(BitmapFileHead.bfOffBits) );

stream->WriteBuffer( &BitmapInfo, sizeof(BitmapInfo) );

(void*)ptr=stream->Memory;

ptr = BitmapFileHead.bfOffBits;

Move( VideoStr->lpData, ptr, BitmapHead.biSizeImage);

// 存入完成

stream->Position=0;

//

Form1->Image1->Picture->Bitmap->LoadFromStream(stream);

//Form1->Panel1-> ->Picture->Bitmap->LoadFromStream( stream );

delete( stream );

capSetCallbackOnFrame (hCapWnd, NULL); //停止callbackonframe

return(0);

}

痾...沒事了發現錯誤...程式碼裡自動把cam設定成160*120
不過預覽的地方還是320*240 所以我以為是程式問題orz...