abrir archivos desde programa hecho en c++

[Dark Avenger]

Supongo que sera ShellExecute o ShellExecuteEx:

Te pondria los links a la MSDN pero este foro es buenisimo:
"You are only allowed to post URLs to other sites after you have made 15 posts or more"

Habra que engañarlo un poco:

msdn.microsoft.com/library/en-us/shellcc/platform/shell/reference/functions/shellexecute.asp

msdn.microsoft.com/library/en-us/shellcc/platform/shell/reference/functions/shellexecuteex.asp