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I am trying to use install custom action dll in a setup project I created in Visual Studio 2008 and x86 platform. I created the project using instruction given on following website: http://www.codeproject.com/Articles/335516/Custom-Action-in-Visual-Studio-setup-projects I am getting an error as "Error 1723. There is a problem with this Windows Installer package. A DLL required for this install to complete could not be run. Contact your support personnel or package vendor." This error I found in a log file created during installation. I searched online for this error but it was not helpful. Also, my dll and setup project are getting compiled successfully. But I am having a warning as "Entry point 'Install' not found in module for 'C:\Users...\Release\deinstallCustAct.dll' custom action 'deinstallCustAct.dll' " and after compilation the dll file which I have added to Install folder of Custom Action is underlined by red curvy line. I am using custom actions for the first time. Please help me to solve this issue. Thanks.

Aparna Savant
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I got the answer. I was not passing the MSIhandle to the custom action function. That's why it was giving me that error and warning. I passed "MSIHANDLE hInstall" to my custom action dll function to get rid of that error and warning! Thank you everyone for your consideration!

Aparna Savant
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I used VSInstaller first time and I face the same problem in the same tutorial

For me helped to build project in Release mode and check that all dependent librares exists. For me it is VCRUNTIME140.dll (here picture from CFF Explorer)

This error happens because I built project in VS2019 in Debug mode and compilled DLL used for their work vcruntime140D.dll, so this DLL was not found on machine without VS and therefore installer was crashed!

Gregory Gustavin
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