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现需要把位图文件（.bmp）输出到打印机上的API函数，急用，请大家帮帮忙。<br>最好有个例子。
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procedure TMainForm.N11Click(Sender: TObject);<br>var<br> ScaleX,ScaleY :Integer;<br> R :TRect;<br>begin<br> if Printer.Printers.Count=0 then<br> begin<br> ShowMessage('请首先安装打印机');<br> Exit; //跳出N11Click<br> end;<br> if not MainPrintDialog.Execute then Exit<br> else<br> begin<br> with Printer do<br> begin<br> BeginDoc;<br> ScaleX :=GetDeviceCaps(Handle,LogPixelsX) div PixelsPerInch;<br> ScaleY :=GetDeviceCaps(Handle,LogPixelsY) div PixelsPerInch;<br> R :=Rect(0,0,MDIChildForm.MainImage.Width*ScaleX,MDIChildForm.MainImage.Height*ScaleY);<br> Canvas.StretchDraw(R,MDIChildForm.MainImage.Picture.Graphic);<br> EndDoc;<br> end;<br> end;<br>end;<br>记得添加Printers单元。
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TO卷起千堆雪tyn：因为程序中的关系，只能用Windows的API函数，不能用Delphi封装过的。<br>
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如果想原样打印，请使用下面的API函数<br>BOOL BitBlt(<br><br> HDC hdcDest, // 目标设备DC句柄，如果打印则为打印机DC<br> int nXDest, // 目标矩形的左上角横坐标<br> int nYDest, // 目标矩形的左上角纵坐标<br> int nWidth, // 目标矩形的宽度<br> int nHeight, // 目标矩形的高度<br> HDC hdcSrc, // 源设备DC句柄<br> int nXSrc, // 原矩形的左上角横坐标<br> int nYSrc, // 源矩形的左上角纵坐标<br> DWORD dwRop // 光栅操作<br>  
;<br>如果想缩放图像使用下面的函数，参数含义基本同上 <br>BOOL StretchBlt(<br><br> HDC hdcDest, // handle of destination device context <br> int nXOriginDest, // x-coordinate of upper-left corner of dest. rect. <br> int nYOriginDest, // y-coordinate of upper-left corner of dest. rect. <br> int nWidthDest, // width of destination rectangle <br> int nHeightDest, // height of destination rectangle <br> HDC hdcSrc, // handle of source device context <br> int nXOriginSrc, // x-coordinate of upper-left corner of source rectangle <br> int nYOriginSrc, // y-coordinate of upper-left corner of source rectangle <br> int nWidthSrc, // width of source rectangle <br> int nHeightSrc, // height of source rectangle <br> DWORD dwRop // raster operation code <br> <br><br>
;<br>如果想缩放图像使用下面的函数，参数含义基本同上 <br>BOOL StretchBlt(<br><br> HDC hdcDest, // handle of destination device context <br> int nXOriginDest, // x-coordinate of upper-left corner of dest. rect. <br> int nYOriginDest, // y-coordinate of upper-left corner of dest. rect. <br> int nWidthDest, // width of destination rectangle <br> int nHeightDest, // height of destination rectangle <br> HDC hdcSrc, // handle of source device context <br> int nXOriginSrc, // x-coordinate of upper-left corner of source rectangle <br> int nYOriginSrc, // y-coordinate of upper-left corner of source rectangle <br> int nWidthSrc, // width of source rectangle <br> int nHeightSrc, // height of source rectangle <br> DWORD dwRop // raster operation code <br> <br><br>
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小橄榄
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接受答案了.
