Its always nice to find the answer to your own question. I found the answer to my question at :
http://www.swiftview.com/tech/createprocess.htm
The function I wanted was. Just thought id post so This thread could help somebody else.
CreateProcess(NULL, " C;\pathtoexe.exe ", NULL, NULL, FALSE,
// Suppress the DOS box.
CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
NULL, NULL, &si, &pi);