RegisterHotKey函数原型及说明:
BOOL RegisterHotKey(
HWND hWnd,
int id,
UINT fsModifiers,
UINT vk
参数 id为你自己定义的一个ID值,对一个线程来讲其值必需在0x0000 - 0xBFFF范围之内,对DLL来讲其值必需在0xC000 - 0xFFFF 范围之内,在同一进程内该值必须唯一
参数 fsModifiers指明与热键联合使用按键,可取值为:MOD_ALT MOD_CONTROL MOD_WIN MOD_SHIFT
参数 vk指明热键的虚拟键码
首先(举个例子):
RegisterHotKey(handle,globaladdatom('hot key'),MOD_ALT,vk_f12);
然后在form中声明一个函数(过程):
procedure hotkey(var msg:tmessage);message wm_hotkey;
过程如下:
procedure TForm1.hotkey(var msg:tmessage);
begin
if (msg.LParamHi=VK_F12) and (msg.LParamLo=MOD_ALT) then
begin
form1.show;
SetForegroundWindow(handle);
end;
end;
这样,不管你在什么地方,窗口就会显示出来。
当然,你要GlobalDeleteAtom;
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
aatom: atom;
procedure hotkey(var msg: tmessage); message wm_hotkey;
public
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.FormCreate(Sender: TObject);
begin
aatom := globaladdatom('hot key');
RegisterHotKey(handle, aatom, MOD_ALT, vk_f12);
end;
procedure TForm1.hotkey(var msg: tmessage);
begin
if (msg.LParamHi = vk_f12) and (msg.LParamLo = MOD_ALT) then
SetForegroundWindow(handle);
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
globalDeleteatom(aatom);
end;
end.