1.MessageDlg function
在屏幕中间显示一个消息对话框
Displays a message dialog box in the center of the screen.
function MessageDlg(const Msg: string; DlgType: TMsgDlgType; Buttons: TMsgDlgButtons;
HelpCtx: Longint): Word;
type TMsgDlgType = (mtWarning, mtError, mtInformation, mtConfirmation, mtCustom);
type
TMsgDlgBtn = (mbYes, mbNo, mbOK, mbCancel, mbAbort, mbRetry, mbIgnore, mbAll,
mbNoToAll, mbYesToAll, mbHelp);
TMsgDlgButtons = set of TMsgDlgBtn;
const
mbYesNoCancel = [mbYes, mbNo, mbCancel];
mbYesAllNoAllCancel = [mbYes, mbYesToAll, mbNo, mbNoToAll, mbCancel];
mbOKCancel = [mbOK, mbCancel];
mbAbortRetryIgnore = [mbAbort, mbRetry, mbIgnore];
mbAbortIgnore = [mbAbort, mbIgnore];
begin
if MessageDlg('Welcome to my Object Pascal application. Exit now?',
mtConfirmation, [mbYes, mbNo], 0) = mrYes then
begin
MessageDlg('Exiting the Object Pascal application.', mtInformation,
[mbOk], 0);
Close;
end;
2.ShowMessage
出现一个含有ok按钮的消息框
Displays a message box with an OK button.
procedure ShowMessage(const Msg: string);
3.MessageBox
为用户显示一个特定的消息
Displays a specified message to the user.
function MessageBox(const Text, Caption: PChar; Flags: Longint = MB_OK): Integer;
with Application do
begin
NormalizeTopMosts;
MessageBox('This should be on top.', 'Look', MB_OK);
RestoreTopMosts;
end;
