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Stored procedures
SysUnlinkExtension (Function)
In french: SysDissocieExtension
Deletes the association between an extension and a command that was created by SysLinkExtension.
Example
// Links the ".txt" extension to the "app.exe" executable
SysLinkExtension(".txt", "C:\Program Files\MyApp\app.exe ""%1""", sysCurrentUser)
...
SysUnlinkExtension(".txt", sysCurrentUser)
Syntax
<Result> = SysUnlinkExtension(<Extension> [, <User>])
<Result>: Boolean
  • True if the unlink operation was performed,
  • False otherwise. ErrorInfo returns more details.
<Extension>: Character string (with quotes)
Extension to free.
<User>: Optional Integer constant
The association between the application and the extension is saved in the registry. Two options are available:
sysCurrentUserThe association will be deleted for the current user only.
sysAllUsers
(Default value)		The association will be deleted for all the users of the current computer.
Remark: You must have the "Administrator" rights to run this operation.
Remarks
Once the extension is freed, the explorer can temporarily store the association or propose the program that was previously linked (independent data of registries).
Component : wd250std.dll
See also
Minimum version required
  • Version 21
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