Editbox

[FantastichenEin]

I have created a window with an EditBox on it.
I want to create a function that appends the EditBox text with a line of text.
I currently have the following.

void OutputDebug(char *text)
{
  SendMessage(hwndEdit, WM_SETTEXT, 0, 
             (LPARAM) text); 
} 

The above code overwrites what is already in the EditBox.
How do I append it?
Thanks