how to pop a "hello world!"messagebox?

[smallwolf]

hello:
i am a beginner in assembly,and i can't wait to test some code. i want to write a simple "hello world" program using inline assembly, how can i pass the string argument to the MessageBoxA()?
if i pass all the NULL value, it works,but not what i want.
i am using wxDevC++7.0, windows xp sp3. thanks, have a good day!

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

int main(int argc, char *argv[])
{
   LPCTSTR user32="user32.dll";
   HMODULE hd=LoadLibrary(user32);
   if(hd)
        printf("User32.dll is loaded!\n");
        
        //0x7e4507ea is the address of MessageBoxA
        
    __asm__(
     
         
         "xor %eax,%eax\n"
         "xor %ebx,%ebx\n"
         "mov $0x7e4507ea,%ebx\n"
         "push %eax\n"
         "push %eax\n"
         "push %eax\n"
         "push %eax\n"
         "call %ebx\n"
             
             
             );
  
  
  
  system("PAUSE");	
  return 0;
}