how to jmp to the function?

[smallwolf]

hello:
i am new in assembly language, and i want to test the "jmp" instruction, try to jmp to the function that i define, and failed. what's wrong with my code?
here's the code:

using wxDevC++, windows xp sp3

void ShowMessage();
int main(int argc, char *argv[])
{  
    
  printf("%p",ShowMessage);
  printf("\n");
 asm(
      "jmp 0x00401332;"       
   );
  //  0x00401332 is ShowMessage address 

system("PAUSE");	
    return 0;

}

void ShowMessage()
{
    MessageBox (0, "ShowMessage()!\n", "Hi", MB_ICONINFORMATION);
    
}