Allow only one installer instance: Difference between revisions
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'myMutex' should be replaced with a unique value. | 'myMutex' should be replaced with a unique value. | ||
Page author: Vytautas | Page author: [[User:Vytautas|Vytautas]] | ||
Revision as of 12:40, 23 April 2005
Description
The best way is to use a kernel mutex. You can call the Win32 API using the System plug-in. Put this code in the .onInit function:
The Script
System::Call 'kernel32::CreateMutexA(i 0, i 0, t "myMutex") i .r1 ?e' Pop $R0 StrCmp $R0 0 +3 MessageBox MB_OK "The installer is already running." Abort
'myMutex' should be replaced with a unique value.
Page author: Vytautas
