Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Extensible Storage Engine class library
GDI+: copying to the Clipboard (a) image of active FoxPro window/form, (b) image file
Capturing keyboard activity of another application with the Raw Input API (VFP9)
Custom GDI+ class
Using Video Capture: displaying on FoxPro form frames and previewing video obtained from a digital camera
Copying picture of the active form to the Clipboard using Enhanced Metafile API functions
Enumerating raw input devices attached to the system (keyboard, mouse, human interface device)
GDI+: Implementing image scrolling with inertia
Using Month Calendar Control (VFP9, Comctl32.dll)
Winsock: sending email messages (SMTP, port 25)
Enumerating data formats currently available on the clipboard
Monitoring clipboard content changes (VFP9)
Converting Unicode data from the Clipboard to a character string using a given code page
Displaying icons in the system tray (VFP9)
Browsing Windows Known Folders (Special Folders)
Displaying dimmed window behind VFP top-level form
How to find which fonts Windows uses for drawing captions, menus and message boxes
HOWTO: Use the Win32 API to Access File Dates and Times
How to prevent users from accessing the Windows Desktop and from switching to other applications
Creating a clipping region from the path selected into the device context of a form
Detecting changes in connections to removable drives (VFP9)
Windows Shell Icons displayed and exported to ICO files (Vista)
Writing entries to custom Event Log
Customizing the frame of top-level form: removing the standard frame (VFP9, Vista)
Creating the Save dialog box to specify the drive, directory, and name of a file to save

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5350 bytes  
Created: 2002-01-25 20:14:30  
Modified: 2011-12-10 09:20:22  
Visits in 7 days: 46  
Listed functions:
CommDlgExtendedError
GetActiveWindow
GetSaveFileName
GlobalAlloc
GlobalFree
GlobalSize
Printer friendly API declarations
My comment:
The OPENFILENAME structure length depends on the OS, and can be 76 or 88 bytes.

This is important, because invalid parameter creates an error. Note that this structure is used with GetOpenFileName and GetSaveFileName functions. There is substantial set of OFN flags to control the dialog behaviour.

To fill the OPENFILENAME structure -- as well as almost all other Comdlg structures used -- you need not just strings but pointers to strings. There is a class PChar in this examples, which creates such extended strings. In more simple cases the StrDup is quite enough to accomplish this task.
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