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How To: P/Invoke External Win32 Functions
Return to DisplayFusion Scripted Functions (Macros)
Description
This function shows how to call external win32 functions using p/invoke. In this case we're calling timeGetTime to get the time in milliseconds since Windows was started.
Language
C# (.Net)
Minimum Version
7.0.0+
Created By
Jon Tackabury (BFS)
Contributors
-
Date Created
Dec 30, 2014
Date Last Modified
Dec 30, 2014
Scripted Function (Macro) Code
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using System; using System.Drawing; // The 'windowHandle' parameter will contain the window handle for the: // - Active window when run by hotkey // - Window Location target when run by a Window Location rule // - TitleBar Button owner when run by a TitleBar Button // - Jump List owner when run from a Taskbar Jump List // - Currently focused window if none of these match public static class DisplayFusionFunction { public static void Run(IntPtr windowHandle) { // call the external win32 function timeGetTime to get the time in milliseconds since Windows was started uint value = timeGetTime(); // show the time BFS.Dialog.ShowMessageInfo(value.ToString("###,###,###,##0") + " ms"); } // this is an external win32 function that we are importing [System.Runtime.InteropServices.DllImport("winmm.dll")] public static extern uint timeGetTime(); }
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