.NET application does not work on other computers

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I have a very complex .NET Windows.Forms Application.
It creates something of tabbed interface in which it hosts (using P/Invoke) multiple instances of another Windows.Forms Application (also created by me), which features a WebBrowser Control (with some other P/Invoke stuff).

It works fine on my computer and can be easily compiled and run on other computers which have Visual Studio installed.

The problem is that it does not work at all if copied on other computers (without Visual Studio). It does not give any error or message, it simply does not start. It does absolutely nothing.

Of course it is not location dependent (it has no hard-coded paths or something).
And, yes, the other computer has .NET Framework installed, duh.

Since it does not do anything, I am unable to further investigate the issue.
So, if you have any ideas what the problem could be, please help me.
Thank you!

Posted 5-Feb-15 4:25am

Toli Cuturicu

Updated 5-Feb-15 4:30am

v3

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ZurdoDev 5-Feb-15 11:08am

There must be an error in the event log.

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OriginalGriff · Accepted Answer · 2015-02-05T04:38:00

Check the version of the .NET framework on the non-working PCs for starters. This may help: A safe way to get the user to check if the .NET framework is installed[^]

Then check the system type / your app type: make sure you aren't trying to run 64bit apps on a 32 bit machine.

Then check that all the DLLs your app uses P/Invoke to access are present, the correct version, and available.

If all of that works, start by creating a trivial app and try that. If it works, add some complexity until you find what is missing - it may be that a DLL that calls a DLL or similar, so just keep going until you find something that doesn't work!