Hi,

I have the following c program which launches a Gtk Program on ubuntu:

#include <unistd.h>

int main( int argc, const char* argv[] )
{
    char *args[2] = { "testarg", 0 };
    char *envp[1] = { 0 };
    execve("/home/michael/MyGtkApp",args,envp);
}

I get "Gtk-WARNING **: cannot open display: " and my program is not launched.

I have tried setting char *envp[1] = {"DISPLAY:0.0"}; and execute 'xhost +' , I dont' see the 'cannot open display' warning, but my program is still not launched.

Does anyone know how to fix my problem?

Thank you.