Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
String representation for disk or memory capacity
The SQLGetProp() creates a bridge between Visual FoxPro and the ODBC API
Using the DeleteFile
Using the GetLogicalDriveStrings
Converting an integer value to a hexadecimal string
Current System information
GDI+: rotating images using matrix transformations
How to empty the Recycle Bin
How to play a waveform sound (a WAV file in particular)
Pocket PC: enumerating mounted database volumes and databases in the Object Store
Using GetSysColor
Using LoadLibrary
Winsock: how to retrieve the protocol information corresponding to a protocol name
How to create a service object
How to release and renew a lease on an IP address previously obtained through Dynamic Host Configuration Protocol (DHCP)
Retrieving the state of your Internet connection
Using the SetErrorMode for determining if a floppy drive is ready
Validating URLs using moniker functions
Winsock: how to retrieve the protocol information corresponding to a protocol number
Displaying the main Dial-Up Networking dialog box
Pocket PC: System Registry Viewer
Using custom Simple MapiSendMail class
Using InternetGoOnline function
Using the GradientFill function
GDI+: loading image file, drawing on it, saving the result to another file

User rating: 0/10 (0 votes)
Rate this code sample:
  • ~
More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
click to open
Before you begin:
The example shows how to load an image file, put semi-transparent frame with a text on it, and save the result to another file.

Make sure the source and target file names are valid. The source file can be in any of graphics formats supported by the GDI+: BMP, GIF, JPG, TIF, EMF...

The code is based on custom GDI+ class. Download the class module first and save it in gdiplus.prg file.

PRIVATE gdiplus, src, dst, himage
gdiplus = CREATEOBJECT("gdiplusinit")

src = CREATEOBJECT("gdiimage", "c:\windows\forest.bmp")
dst = CREATEOBJECT("gdiimage", src)

IF dst.imgtype=0 OR VARTYPE( <> "O"
    ? "Error code:", dst.errorcode

LOCAL gdibrush, gdipen, fnt
STORE 0 TO gdibrush, gdipen

* creating brush, pen and font objects
* note that the alpha channel is defined for the solid brush,
* which creates semi-transparent fill
= GdipCreateSolidFill(ARGB(255,255,255, 128), @gdibrush)
= GdipCreatePen1(ARGB(220,220,255), 2, 2, @gdipen)
fnt = CREATEOBJECT("gdifont", "Arial", 24, 1, ARGB(220,220,255))

* drawing filled semi-transparent rectangle with a border
= GdipFillRectangle(, gdibrush, 5,5, 160,50)
= GdipDrawRectangle(, gdipen, 5,5, 160,50)

* printing text
    fnt, 10,10, dst.imgwidth-10, 0)

* releasing system resources
= GdipDeletePen(gdipen)
= GdipDeleteBrush(gdibrush)

* creating drawing surface based on main VFP window
gr = CREATEOBJECT("graphics", _screen.HWnd)

gr.DrawImage(src, 20,20)
gr.DrawImage(dst, 20+src.imgwidth+5,20)

*= dst.SaveToFile("d:\temp\tmp.bmp")

* end of main

User rating: 0/10 (0 votes)
Rate this code sample:
  • ~
1294 bytes  
Created: 2004-07-22 12:43:04  
Modified: 2005-10-13 10:33:55  
Visits in 7 days: 41  
Listed functions:
Printer friendly API declarations
My comment:
The transparency is controlled by the alpha-channel value. In this particular example a semi-transparent solid brush is used.

#kwd: sln_gdiplus.
Word Index links for this example:
Translate this page:
  Spanish    Portuguese    German    French    Italian offers instant, free translations of text or web pages.
User Contributed Notes:
There are no notes on this subject.

Copyright 2001-2017 News2News, Inc. Before reproducing or distributing any data from this site please ask for an approval from its owner. Unless otherwise specified, this page is for your personal and non-commercial use. The information on this page is presented AS IS, meaning that you may use it at your own risk. Microsoft Visual FoxPro and Windows are trade marks of Microsoft Corp. All other trademarks are the property of their respective owners. 

Privacy policy
Credits: PHP (4.4.9), an HTML-embedded scripting language, MySQL (5.6.36), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (
12 sec.Function: 'SendMessage'
25 sec.Function: 'GetFullPathName'
Function group: 'File Management'
39 sec.Gallery
Page 9
52 sec.Example: 'How to change display settings: screen resolution, screen refresh rate'
1.13 min.Example: 'Downloading files from the FTP server using InternetReadFile'
1.37 min.Solution: 'ContextMenu ActiveX Control'
1.67 min.Example: 'Enumerating MIDI output devices'
2.22 min.Function: 'CryptGetProvParam'
Function group: 'Cryptography Reference'
2.8 min.Function: 'mmioRead'
Function group: 'Windows Multimedia'
Advertise here!