WxMessageBox
From WxWiki
wxMessageBox displays a messagebox with an optional icon. It is a dialog function.
[edit] Example
wxMessageBox("Hello World!");
int i = 7;
wxString Foobar;
Foobar.Printf("Hello I have %d cookies.", i);
wxMessageBox(Foobar);
wxMessageBox("This is the message.", "This is the title", wxICON_INFORMATION);
