ShellExecute, what am i doing wrong? - Solved.

Just trying to test this and no way to run any external program from the expert... could you help me? I'm getting always error code 2 on the alert popup window. Build 610 Running on a WIndows 7 Ultimate machine.

#import "shell32.dll"
   int ShellExecuteA(int hWnd, string Verb, string File, string Parameter, string Path, int ShowCommand);
#import

int start()

{    

      Shell("cmd.exe", "cd");
      return(0);

} 

bool Shell(string file, string parameters=""){
    #define DEFDIRECTORY NULL
    #define OPERATION "open"       
    #define SW_HIDE             0   
    #define SW_SHOWNORMAL       1
    #define SW_NORMAL           1
    #define SW_SHOWMINIMIZED    2
    #define SW_SHOWMAXIMIZED    3
    #define SW_MAXIMIZE         3
    #define SW_SHOWNOACTIVATE   4
    #define SW_SHOW             5
    #define SW_MINIMIZE         6
    #define SW_SHOWMINNOACTIVE  7
    #define SW_SHOWNA           8
    #define SW_RESTORE          9
    #define SW_SHOWDEFAULT      10
    #define SW_FORCEMINIMIZE    11
    #define SW_MAX              11
    int r=ShellExecuteA(0, OPERATION, file, parameters, DEFDIRECTORY, SW_SHOW);
    if (r <= 32){   Alert("Shell failed: ", r); return(false);  }
    return(true);
}

Damn it. Unicode. ShellExecuteW instead. Thanks.