Last year, I've spend a lot of time to develop a picture treatment dll, there are 6 functions in this dll,
they are:
1 formtobmp
2 formtobmpA
3 tojpeg
4 tobmp
5 getbmpdimension
6 getjpgdimension
In this paper, I'll simply explain their functionality, parameters and how to use them.
Anybody who need source code of this dll, please email to njjane@21cn.com (they are write by are C++,not vfp).
James Khan
njjane@21cn.com
http://www.myf1.net/foxcryptor/
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Important : To correct use PCT_DLL.dll, you must put it to your system directory or current directory!!!
1 formtobmp
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Description:
capture window or screen image into a bitmap file
Declareation:
Declare Integer formtobmp IN "PCT_DLL.dll" integer hwnd,String bmpFileName
Parameters:
hwnd
Handle to the window to be saves to a bitmap file. if this parameter is zero, then saves desktop to a bitmap file.
bmpFileName
The bitmap filename to be save. must include full path name.
Note:
The function returns a zero result on success,else 1 is returned.
Example in Visual FoxPro:
retVal = formtobmp(0,"c:\screen.bmp") && Save screen to file c:\screen.bmp
if retval = 0 && if success
messagebox("Capture screen ok! bmp file has been saved to file c:\screen.bmp")
endif
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2 formtobmpA
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Description:
also a function to capture window or screen image into a bitmap file,but in this function,
you can specified a area of screen/window to save.
Declareation:
Declare Integer formtobmpA IN "PCT_DLL.dll" string bmpfilename,integer nX,integer nY,integer nX2,integer nY2
Parameters:
bmpFileName
The bitmap filename to be save. must include full path name.
nX
x-coord of upper-left corner of bitmap file
nX2
x-coord of lower-right corner of bitmap file
nY
y-coord of upper-left corner of bitmap file
nY2
y-coord of lower-right corner of bitmap file
Note:
The function returns a zero result on success,else 1 is returned.
Example in Visual FoxPro:
retVal = formtobmpA("c:\screen0.bmp",20,20,400,400) && Save screen to file c:\screen.bmp
if retval = 0
messagebox("Capture screen ok!")
endif
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3 tojpeg
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Description:
Convert a bmp file to a jpg file
Declareation:
Declare Integer tojpeg IN "PCT_DLL.dll" String bmpfilename, String jpgfilename
Parameters:
bmpfilename
BMP filename to be convert.
jpgfilename
JPEG filename
Note:
The function returns a zero result on success,else 1 is returned.
Example in Visual FoxPro:
retval = tojpeg("c:\screen.bmp","c:\screen.jpg") && Convert c:\screen.bmp to c:\screen.jpg
if retval = 0
messagebox("Convert bitmap to jpeg ok!")
endif
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4 tobmp
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Description:
Convert a jpg file to a bmp file
Declareation:
Declare Integer tobmp IN "PCT_DLL.dll" String jpgfilename, String bmpfilename
Parameters:
jpgfilename
JPEG filename to be convert.
bmpfilename
BMP filename
Note:
The function returns a zero result on success,else 1 is returned.
Example in Visual FoxPro:
retval = tobmp("c:\screen.jpg","c:\screen2.bmp") && Convert c:\screen.jpg to c:\screen2.bmp
if retval = 0
messagebox("Convert jpeg to bitmap success!")
endif
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5 getbmpdimension
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Description:
Get a dimensions of a bitmap
Declareation:
Declare Integer getbmpdimension IN "PCT_DLL.dll" string bmpfilename, integer @ nwidth,integer @ nheight
Parameters:
bmpfilename
origin bitmap filename.
nwidth
bitmap's width measured in pixels.
nheight
bitmap's height measured in pixels.
Note:
if success, return value 0, else return 1.
if success, variable nwidth hold the bitmap's width ,variable nheight hold the bitmap's height.
Example in Visual FoxPro:
nwidth=0
nheight=0
retval = getbmpdimension("c:\screen.bmp",@ nwidth, @ nheight)
if retval = 0
messagebox("Width:"+str(nwidth)+chr(13)+"Height:"+str(nheight))
endif
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6 getjpgdimension
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Description:
Get a dimensions of a jpeg file
Declareation:
Declare Integer getjpgdimension IN "PCT_DLL.dll" string jpgfilename, integer @ nwidth,integer @ nheight
Parameters:
jpgfilename
origin jpeg filename.
nwidth
jpeg's width measured in pixels.
nheight
jpeg's height measured in pixels.
Note:
if success, return value 0, else return 1.
if success, variable nwidth hold the jpeg's width ,variable nheight hold the jpeg's height.
Example in Visual FoxPro:
nwidth=0
nheight=0
retval = getjpgdimension("c:\screen.jpg",@ nwidth, @ nheight)
if retval = 0
messagebox("Width:"+str(nwidth)+chr(13)+"Height:"+str(nheight))
endif
clear dlls
