send tro hand its 就是 nbsp control res 組合鍵

KEYPRESS
When a windowed control receives a key-press message (WM_CHAR) from Windows, its message handler calls the DoKeyPress method.
說明：響應WM_CHAR消息，不包括一些功能鍵，如：F1，SHIFT鍵等

KEYDOWN
When a windowed control receives a key-down message (WM_KEYDOWN) from Windows, its message handler calls the DoKeyDown method.

響應WM_KEYDOWN消息

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一個是按下去，一個是按下放上來時

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procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char);
begin
//只能觸發單鍵事件
end;

procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
begin
//在keyDown事件裏可以觸發shift+A等組合鍵事件
end;

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Drate回答正確,其它人都沒搞清楚,那是OnKeyUp!其實響應WM_CHAR就是按下字符鍵時激發,而按下其他功能鍵無效!

procedure WMChar(var Message: TWMChar); message WM_CHAR;

procedure TWinControl.WMChar(var Message: TWMChar);
begin
if not DoKeyPress(Message) then inherited;
end;

procedure WMKeyDown(var Message: TWMKeyDown); message WM_KEYDOWN;

procedure TWinControl.WMKeyDown(var Message: TWMKeyDown);
begin
if not DoKeyDown(Message) then inherited;
end;

keydown和KeyPress事件有何不同