you can use the fonction "ShellExecute".
Here is a little example on how you can use it:
#include <windows.h>
#include <shellapi.h>
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
ShellExecute (NULL,"open","path_to_file",NULL,NULL,SW_SHOWNORMAL);
return 0;
}
you need to replace path_to_file with the convenient path.