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Protect Your Screen Saver From Restarting

Protect Your Screen Saver From Restarting

When you create a screen saver in Visual Basic, you may sometimes utilize the command-line options such as “/s” to start a screen saver directly or “/c” to run the configuration. By simply using App.PrevInstance, your application may not detect the running screen saver and attempt to start another when the normal Windows screen saver time-out occurs. To ensure that Windows will detect the running screen saver, regardless of the use of command-line options, use this code:

 Private Declare Function GetModuleHandle% Lib "Kernel" _	(ByVal lpModuleName$)Private Declare Function GetModuleUsage% Lib "Kernel" _	(ByVal hModule%)Sub StartUp()Dim Inst%	Inst = GetModuleHandle(App.Path + _		"" + CStr(Trim(App.EXEName) + ".scr"))	If GetModuleUsage_		(GetModuleHandle(App.Path + "" _		+ CStr(Trim(App.EXEName) + ".scr"))) > 1 Then EndEnd Sub

Call the sub like this:

 Sub Main()	Call StartUpEnd 

This method works well with Windows 3.11. You can use this basic idea with any application you write, not just screen savers.

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