The ShellExecute function opens or prints a specified file. The file can be an executable file or a document file. See ShellExecuteEx also. 

HINSTANCE ShellExecute(

    HWND hwnd,   // handle to parent window
    LPCTSTR lpOperation,   // pointer to string that specifies operation to perform
    LPCTSTR lpFile,   // pointer to filename or folder name string
    LPCTSTR lpParameters,   // pointer to string that specifies executable-file parameters 
    LPCTSTR lpDirectory,   // pointer to string that specifies default directory
    INT nShowCmd    // whether file is shown when opened
   );