Dear All, I want to open another exe file in my C++ program. Let the exe file be A.exe. So I used shell execute inside my C++ program to open the file but as A.exe writes in a file certain data that I will use in the next step of my program I must wait till A.exe finishes. The execution time of A.exe can't be predicted, it may take a flash or it may take days!!, but I must wait till it finishes its code and output the file that I want to read. So is there a fucntion that I can call to wait till A.exe that I openned with shell execute finishes?. Please explain clearly as I'm not a proffesional C++ programmer. Note: A.exe don't set a file openning restrictions, so I can open the file even it contains only part of the data not all of it. Thanks in advance.