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Delphi4.0
win98
VB能把ALT+TAB和CTRL+m等键传给其它程序,而DELPHI4.0如何实现?(djs)
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可以利用Windows API的keybd_event函数，它可以产生键盘消息。例子：
procedure TForm1.Button1Click(Sender: TObject);
begin
{按下A键}
Edit1.SetFocus;
keybd_event(VK_SHIFT, 0, 0, 0);
keybd_event(ord('A'), 0, 0, 0);
keybd_event(VK_SHIFT, 0, KEYEVENTF_KEYUP, 0);
{按下左Window键然后选择“运行”}
keybd_event(VK_LWIN, 0, 0, 0);
keybd_event(ord('R'), 0, 0, 0);
keybd_event(VK_LWIN, 0, KEYEVENTF_KEYUP, 0);
end;
下面是一个封装好的函数，用起来更方便一些：
Procedure PostKeyEx32( key: Word; Const shift: TShiftState; specialkey: Boolean );
{************************************************************
* Procedure PostKeyEx32
*
* Parameters:
* key : virtual keycode of the key to send. For printable
* keys this is simply the ANSI code (Ord(character)).
* shift : state of the modifier keys. This is a set, so you
* can set several of these keys (shift, control, alt,
* mouse buttons) in tandem. The TShiftState type is
* declared in the Classes Unit.
* specialkey: normally this should be False. Set it to True to
* specify a key on the numeric keypad, for example.
* Description:
* Uses keybd_event to manufacture a series of key events matching
* the passed parameters. The events go to the control with focus.
* Note that for characters key is always the upper-case version of
* the character. Sending without any modifier keys will result in
* a lower-case character, sending it with [ssShift] will result
* in an upper-case character!
*Created: 17.7.98 by P. Below
************************************************************}
Type
TShiftKeyInfo = Record
shift: Byte;
vkey : Byte;
End;
byteset = Set of 0..7;
Const
shiftkeys: Array [1..3] of TShiftKeyInfo =
((shift: Ord(ssCtrl); vkey: VK_CONTROL ),
(shift: Ord(ssShift); vkey: VK_SHIFT ),
(shift: Ord(ssAlt); vkey: VK_MENU ));
Var
flag: DWORD;
bShift: ByteSet absolute shift;
i: Integer;
Begin
For i := 1 To 3 Do Begin
If shiftkeys[i].shift In bShift Then
keybd_event( shiftkeys[i].vkey, MapVirtualKey(shiftkeys[i].vkey, 0), 0, 0);
End; { For }
If specialkey Then
flag := KEYEVENTF_EXTENDEDKEY
Else
flag := 0;
keybd_event( key, MapvirtualKey( key, 0 ), flag, 0 );
flag := flag or KEYEVENTF_KEYUP;
keybd_event( key, MapvirtualKey( key, 0 ), flag, 0 );
For i := 3 DownTo 1 Do Begin
If shiftkeys[i].shift In bShift Then
keybd_event( shiftkeys[i].vkey, MapVirtualKey(shiftkeys[i].vkey, 0), KEYEVENTF_KEYUP, 0);
End; { For }
End; { PostKeyEx32 }
例子：
procedure TForm1.Button1Click(Sender: TObject);
begin
// 按下左Window键
PostKeyEx32(VK_LWIN, [], FALSE);
// 按下D键
PostKeyEx32(ORD('D'), [], FALSE);
// 按下Ctrl-Alt-C
PostKeyEx32(ORD('C'), [ssctrl, ssAlt], FALSE);
end;
 相关问题：
QA004895 "用keybd_event如何模拟[{, ]}, -_, =+等"
此问题由李海回答。
附加关键字：编程, 源程序, programming, source code, Delphi, VCL, Borland, 其他方面, 。
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Delphi怎么传递按键给其它程序