Single Instance Checker

• Download source files - 28 Kb
• Download demo project - 4 Kb

Introduction

If you want your application have just only instance is run in the same time, you only download and use it.

Step 1: Add file "LimitSingleInstance.h" to your project. This file is written by Microsoft. :-)

Step 2: Run UUIDGEN.EXE to get ID. This tool is written by Micorosft :-)

Step 3: Declare a variable

CLimitSingleInstance g_SingleInstanceObj(TEXT("{ID get from UUIDGEN}"));

for ex: CLimitSingleInstance g_SingleInstanceObj(TEXT("{addb6c1d-d98d-40f4-8041-0eb6b8bc884c}"));

Step 4: InitInstance()

Only add this line to check instance and make sure only 1 instance can run.

if (g_SingleInstanceObj.IsAnotherInstanceRunning()) return FALSE;

VERY and VERY SIMPLE.

I get this information and "LimitSingleInstance.h" from KnowledgeBase of Mirosoft site.