Use of the MessageBox in Delphi (GO)

Imename property of the MessageBox dialog input control to remove the input method will be the default English input

MessageBox dialog is a more commonly used Information dialog box, which can not only define the displayed information content, information hint icon, but also can define the button combination and dialog box title, is a full-featured Information dialog box information hint icon, and can define the button combination and dialog box title, is a full-featured information on the box.
1. function prototype and Parameters
function MessageBox (Hwnd:hwnd; Text, Caption:pchar; Type:word): Integer;
HWnd: Dialog Parent window handle, dialog box appears in the Delphi window, you can use the form's handle property, otherwise 0, make it directly as a child window of the desktop window.
Text: The string of information to display.
Caption: Dialog box title string.
Type: Constant for the dialog box.
The return value of the function is an integer that is used for the recognition of the dialog button.
2. Type Constants
The Type constants for dialog boxes can be combined by a combination of buttons, default buttons, display icons, and four constants of run mode.
(1) button combination constants
MB_OK = $00000000; A OK button
Mb_okcancel = $00000001; A OK button, a Cancel button
Mb_abortretryignore = $00000002; An abort button, a retry button, a ignore button
Mb_yesnocancel = $00000003; One is a button, a No button, a Cancel button
Mb_yesno = $00000004; One is a button, a No button
Mb_retrycancel = $00000005; A retry button, a Cancel button
(2) Default button constants
Mb_defbutton1 = $00000000; The first button is the default button
Mb_defbutton2 = $00000100; The second button is the default button
Mb_defbutton3 = $00000200; The third button is the default button
Mb_defbutton4 = $00000300; The fourth button is a default button
(3) Icon constants
Mb_iconhand = $00000010; "X" number icon
Mb_iconquestion = $00000020; “？ "Number icon
Mb_iconexclamation = $00000030; “！ "Number icon
Mb_iconasterisk = $00000040; "I" icon
Mb_usericon = $00000080; User icon
mb_iconwarning = mb_iconexclamation; “！ "Number icon
Mb_iconerror = Mb_iconhand; "X" number icon
Mb_iconinformation = Mb_iconasterisk; "I" icon
Mb_iconstop = Mb_iconhand; "X" number icon
(4) Operating mode constants
Mb_applmodal = $00000000; Application mode, which can be switched to another application before the dialog box is closed
Mb_systemmodal = $00001000; System mode, you must close the dialog box before you can do other things
Mb_taskmodal = $00002000; Task mode, you can switch to another application before the dialog box is closed
Mb_help = $00004000; Help Button
3. function return value
0//dialog box failed to build
IdOk = 1/Press the OK button
IdCancel = 2/Press the Cancel button
Idabout = 3//Press the Abort button
Idretry = 4//Press Retry button
Idignore = 5/Press the Ignore button
Idyes = 6/Press Yes button
Idno = 7//Press no button

Example: MessageBox (0, ' No Play type selected ', ' Error ', mb_iconexclamation);

--application.messagebox (' MessageBox ', ' warning ', mb_iconwarning+mb_yesno);
--messagebox (Form1.handle, ' MessageBox ', ' hint ', mb_iconinformation+mb_okcancel);
--messagebox (Form1.handle, ' MessageBox ', ' hint ', mb_iconinformation+mb_okcancel+mb_defbutton2);
--If MessageBox (Form1.handle, ' MessageBox ', ' hint ', mb_iconinformation+mb_okcancel) = IdOk Then
Begin
ShowMessage (' Ok ');
End

Use of the MessageBox in Delphi (GO)