Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Custom GDI+ class
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Storing screen shot of a form to bitmap file
Displaying dimmed window behind VFP top-level form
GDI+: Implementing image scrolling with inertia
Storing content of the Clipboard to a bitmap file
Vertical Label control
Browsing Windows Known Folders (Special Folders)
Enumerating devices installed on the local machine
How to change display settings: screen resolution, screen refresh rate
Placing an arbitrary rectangular area of main VFP window on the Clipboard
How to put a vertical text scrolling on the form (a movie cast)
Winsock: sending email messages (SMTP, port 25)
How to print FoxPro form
Subclassing CommandButton control to create BackColor property
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Printing Image File, programmatically set print page orientation to landscape
How to ping a remote site using ICMP API calls
Creating a console window for Visual FoxPro application
Custom HttpRequest class (WinHTTP)
Displaying icons in the system tray (VFP9)
Using FoxTray ActiveX control: System Tray Icon and menu attached to VFP form
How to put a horizontal text scrolling on the form (a news line, marquee)
Creating the Save dialog box to specify the drive, directory, and name of a file to save

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User rating: 8/10 (1 votes)
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5350 bytes  
Created: 2002-01-25 20:14:30  
Modified: 2011-12-10 09:20:22  
Visits in 7 days: 95  
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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