MessageBox usage in Delphi

 

Message box is a common control with many attributes. This article lists some of its common methods and its application scenarios.

1. Simple usage, without graphics

MessageBox (0, 'disagree ', 'hs', MB_ OK );

MessageBox (0, 'disagree ', 'hs', MB_OKCANCEL );

2. warning dialog box:

MessageBox (0, 'password cannot be blank, please enter password', 'Warning ', MB_ICONEXCLAMATION );

3. Prompt dialog box:

MessageBox (0, 'password cannot be blank, please be sure to enter password', 'hs', MB_ICONASTERISK and MB_ICONINFORMATION );

4. complex usage:

MessageBox (Handle, PChar ('process' + Listview1.Selected. caption + 'cannot be ended! '), PChar ('hprompt'), MB_ICONEXCLAMATION );

Common attributes

Default System icon, which can be displayed in the message box
X error MB_ICONHAND, MB_ICONSTOP, and MB_ICONERROR
? Ask MB_ICONQUESTION
! Warning MB_ICONEXCLAMATION and MB_ICONWARNING
I Information MB_ICONASTERISK and MB_ICONINFORMATION

Button format
MB_ OK default
MB_OKCANCEL confirm cancel
MB_YESNO?
Whether MB_YESNOCANCEL is canceled

Return Value
Idcancel unselect
IDNO no selected
Idok determines to be selected
Idyes is selected

Supplement:
The above message box is used in Delphi. If not, MessageBox (null, "DDD", "DDD", mb_ OK); or MessageBox (hwnd, "DDD ", "DDD", mb_ OK); hwnd is the handle of a window, or afxmessagebox is used directly.