好复杂啊

不肯逐行代码弄懂它，确实很复杂。等吧，现成的总会有人给的。

10楼的代码测试很灵光，一句一句慢慢学吧

谢谢啦

这才是正确的学习态度。

水平比较差正在慢慢学习

10楼的代码在VFP6下提示：
在PRIVATE pSourceFileNAme,pNewFileNAme,nWidth,nHeight  处找不到parameters 语句？咋办？

*VFP6.0代码
*更改图片尺寸的大小
=resizeimage([f:\yyrj\3.jpg],[f:\yyrj\31.jpg],400,300)
Declare INTEGER ShellExecute IN shell32;
    INTEGER hwnd, STRING lpOperation,;
    STRING lpFile, STRING lpParameters,;
    STRING lpDirectory, INTEGER nShowCmd
= ShellExecute (0, [open], [f:\yyrj\3.jpg],[],[], 3) && 原图
=INKEY(2) && 等待2秒钟再查看新图
= ShellExecute (0, [open], [f:\yyrj\31.jpg],[],[], 3) && 新图

*******************************************
*算法制作:行者孙(QQ:310727570)
*******************************************
FUNCTION RESIZEIMAGE
PARAMETERS  pSourceFileNAme,pNewFileNAme,nWidth,nHeight
DECLARE INTEGER GdiplusStartup IN gdiplus INTEGER @token, STRING @INPUT, INTEGER OUTPUT
LOCAL hToken, cInput
hToken = 0
cInput = PADR(CHR(1), 16, CHR(0))
GdiplusStartup(@hToken, @cInput, 0)
DECLARE INTEGER GdipLoadImageFromFile IN gdiplus.DLL STRING wFilename, INTEGER @nImage
LOCAL nImage
nImage = 0
GdipLoadImageFromFile(STRCONV(pSourceFileNAme + CHR(0), 5), @nImage)
#DEFINE   GDIPLUS_PIXELFORMAT_32bppARGB          0x0026200A
DECLARE INTEGER GdipCreateBitmapFromScan0 IN gdiplus.DLL ;
   INTEGER nWidth, INTEGER nHeight, INTEGER nStride;
   , INTEGER nPixelFormat, STRING @cScan0, INTEGER @nImage
LOCAL nBitmap, nX, nY
nBitmap = 0
nX = 0
nY = 0
GdipCreateBitmapFromScan0(nWidth, nHeight, 0, GDIPLUS_PIXELFORMAT_32bppARGB, 0, @nBitmap)
DECLARE INTEGER GdipGetImageGraphicsContext IN gdiplus.DLL INTEGER nImage, INTEGER @ nGraphics
LOCAL nGraphics
nGraphics = 0
GdipGetImageGraphicsContext (nBitmap, @nGraphics)
DECLARE INTEGER GdipDrawImageRect IN gdiplus.DLL ;
   INTEGER nGraphics, INTEGER nImage, SINGLE,SINGLE,SINGLE,SINGLE
GdipDrawImageRect(nGraphics, nImage, nX, nY, nWidth, nHeight)
LOCAL lcEncoder
lcEncoder = REPLICATE(CHR(0),16)
DECLARE INTEGER CLSIDFromString IN ole32 STRING lpsz, STRING @pclsid
CLSIDFromString(STRCONV("{557CF401-1A04-11D3-9A73-0000F81EF32E}" + CHR(0), 5), @lcEncoder)
DECLARE INTEGER GdipSaveImageToFile IN gdiplus.DLL ;
   INTEGER nImage, STRING wFilename, STRING qEncoder, INTEGER nEncoderParamsPtr
ERASE (pNewFileNAme)
DECLARE Long GdipDisposeImage IN Gdiplus.dll Long nativeImage
GdipDisposeImage(nImage)
GdipSaveImageToFile (nBitmap, STRCONV(pNewFileNAme,5) + CHR(0), lcEncoder, 0)
DECLARE INTEGER GdiplusShutdown IN gdiplus INTEGER token
GdiplusShutdown(hToken)
CLEAR DLLS
ENDFUNC

上述代码是改为400,300，原始照片是150X200，用上述程序后变成400X300。


150X200                       400X300
现在我要把400X300改为成150x200，倒改过去。
=resizeimage([f:\yyrj\3.jpg],[f:\yyrj\31.jpg],150,200)


程序结果：是一片黑，没有人像。不知何处还要修改代码？请明示。

文件名改了吗

sdta：已介决了，谢谢!太热心了。不愧是班主。