OutputDebugString

OutputDebugString( ) is a Windows method for emitting a text string to some output device (window/file/external debugger).

Lazarus will show these messages in the IDE Window: Event Log accessible from Main menu > View > Debug Windows > Event Log. Alternatively, the shortcut keys Ctrl+Alt+V will open the Event Log window.

Note: You will need to include the Windows unit for the WinAPI in your application's Uses clause.

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From the Free Pascal wiki, page "OutputDebugString", as it stood on 2021-02-01 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's Licensing page. If you have concerns about this material, message the admin.