A File Manager extension (or another application) sends an FM_RELOAD_EXTENSIONS message to cause File Manager to reload all extension DLLs listed in the [AddOns] section of the WINFILE.INI file.
FM_RELOAD_EXTENSIONS wParam = 0; // not used, must be zero lParam = 0; // not used, must be zero
This message has no parameters.
This message does not return a meaningful value.
Other applications can use the PostMessage function to send this message to File Manager. To obtain the appropriate File Manager window handle, an application can specify “WFS_Frame” as the lpszClassName parameter in a call to the FindWindow function.