CreateProcess can not successfully start my process but the exe is running properly by double clicking

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I can't run two exe successfully by CreateProcess method. Each of those two exe's reads some files, registry and database during start up. I have tested the same code to run the system calculator and it is working fine.

When I am trying to run those applications by CreateProcess method, the first application is getting closed automatically after start up and the second one cannot open xx.dat file and failed to read registry and data base. Please see the following code.

C++

PROCESS_INFORMATION processinfo;
STARTUPINFO startUpInfo;
ZeroMemory(&processinfo, sizeof(processinfo));
ZeroMemory(&startUpInfo, sizeof(startUpInfo));
startUpInfo.cb = sizeof(startupInfo);

BOOL bSuccess = CreateProcess(csAppName, NULL, NULL, NULL, FALSE, 0, NULL, NULL, &startUpInfo, &processinfo);

I am getting bSuccess as TRUE always.
Calculator is successfully running with this code but those two applications not.
Also I have tried with "ShellExecute()" and "ShellExecuteEx()" methods with "runas" parameter, but result is the same.
Can anyone help me??????

Posted 28-Apr-15 21:51pm

Shubha Debnath

Updated 20-May-15 0:17am

Frankie-C

v3

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Richard MacCutchan 20-May-15 6:23am

You need to add some debug code to the programs to see why they do not run in these circumstances.

1 solution

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Frankie-C · Answer 1 · 2015-05-20T00:35:00

Solution 1

You have assigned to NULL the lpCurrentDirectory parameter, so the default running directory of your executable is the current directory of the calling process.
If the files to read are in another directory the code will fail. Moreover it will fail if a component is not found (see[^]). Because the function returns before the process has finished initialization if a required DLL cannot be located, or fails to initialize, the process is terminated.
You can supply the full path for files to open or you have to supply the current directory from where to run the application.

Posted 20-May-15 0:35am

Frankie-C

Updated 20-May-15 0:41am

v4

Comments

Shubha Debnath 6-Aug-15 8:18am

CreateProcess successfully starts the application. But the application is getting closed automatically after start up and the second one cannot open xx.dat file and failed to read registry and data base. Please see the following code.

Please note that those are two separate application run individually and shows different behavior.

Frankie-C 6-Aug-15 15:15pm

Which code? there is nothing.
BTW we cannot understand what happen if you don't show us some code of your exe's.
What is xx.dat file, who create it, where is it created?