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Hello<br />
<br />
&nbsp; Use CreateProcess API to lunch the C application, and use WaitForSingleObject API, to make your VB application wait till the lunched program finish, then the control will back to your VB applicationa will continue it's work<br />
<br />
this is not the best option, maybe using Com Exe with Callback function will be better option, but I didn't tried that before<br />
<br />

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Hello

  Use CreateProcess API to lunch the C application, and use WaitForSingleObject API, to make your VB application wait till the lunched program finish, then the control will back to your VB applicationa will continue it's work

this is not the best option, maybe using Com Exe with Callback function will be better option, but I didn't tried that before



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IF you don't want to wait for C program to finish, Just use Shell command to start your C program
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IF you don't want to wait for C program to finish, Just use Shell command to start your C program

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I need to invoke a C program from Visual basic.This C program does some calculations which takes approx. an hour and write &nbsp;results in a file. What i need is to invoke this C Program from VB and then control should come back to Visual basic program so that processing is going at the end and C program is writing data in File and user is able to work on UI(Visual basic) as well.<br />
Is it possible?
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I need to invoke a C program from Visual basic.This C program does some calculations which takes approx. an hour and write  results in a file. What i need is to invoke this C Program from VB and then control should come back to Visual basic program so that processing is going at the end and C program is writing data in File and user is able to work on UI(Visual basic) as well.
Is it possible?

calling C program from Visual basic and runnig both simultaneously

Most development for the Microsoft platform is done utilizing the technologies supported by the.NET framework. Other development is done using Visual Basic for Applications (VBA) for programs like Access, Excel, Word and Outlook, with PowerShell for scripting, or with SQL for large databases.

Microsoft Development

Visual Basic is Microsoft’s event-driven programming language and integrated development environment (IDE) for its Component Object Model (COM) programming model. It is relatively easy to learn and use because of its graphical development features and BASIC heritage. It has been replaced with VB.NET, and is very similar to VBA (Visual Basic for Applications), the programming language for the Microsoft Office product line.