xsendkeys.pas

我自己用的Delphi函数单元 具体说明见打包文件的HELP目录下面

unit xSendkeys;

interface

Uses SysUtils, Windows, Messages;


Function SendKeys(SendKeysString : PChar; Wait : Boolean) : Boolean;
(*
SendKeysString：发送到当前输入焦点的键名字符串和修饰符；
Wait ：指示函数在继续进行前是否等待每个键消息被处理完成。
1、支持VB SendKeys语法：

修饰符：+ :Shift,^ :Control,%:Alt

2、支持的特殊字符：
~ :Enter ( :修饰符组开始; ):修饰符组结束; {:键名文本开始; }:键名文本结束

3、支持的字符:
支持所有可输入字符。

BKSP, BS, BACKSPACE、TAB、ENTER 、ESC、ESCAPE
HOME 、END 、LEFT、RIGHT、UP、DOWN、PGDN 、PGUP 
SCROLLLOCK、CAPSLOCK、NUMLOCK、PRTSC ;
INS 、DEL、DELETE、BREAK 、CLEAR 
F1 - F16 、 HELP

4、说明：
连续多次发送：{left 6}
以圆括号分组键名序列。如：'+abc' shift和a键同时按下, 而 '+(abc)' shift保持按下，同时按下abc字符。

*)

//激活指定窗口成为焦点窗口，WindowName为欲使之成为当前输入焦点的窗口名。
function AppActivate(WindowName : PChar) : boolean;


const
  WorkBufLen = 40;
var
  WorkBuf : array[0..WorkBufLen] of Char;

implementation
type
  THKeys = array[0..pred(MaxLongInt)] of byte;
var
  AllocationSize : integer;

(*
Converts a string of characters and key names to keyboard events and
passes them to Windows.

Example syntax:

SendKeys('abc123{left}{left}{left}def{end}456{left 6}ghi{end}789', True);

*)

Function SendKeys(SendKeysString : PChar; Wait : Boolean) : Boolean;
type
  WBytes = array[0..pred(SizeOf(Word))] of Byte;

  TSendKey = record
    Name : ShortString;
    VKey : Byte;
  end;

const
  {Array of keys that SendKeys recognizes.

  If you add to this list, you must be sure to keep it sorted alphabetically
  by Name because a binary search routine is used to scan it.}

  MaxSendKeyRecs = 41;
  SendKeyRecs : array[1..MaxSendKeyRecs] of TSendKey =
  (
   (Name:'BKSP';            VKey:VK_BACK),
   (Name:'BS';              VKey:VK_BACK),
   (Name:'BACKSPACE';       VKey:VK_BACK),
   (Name:'BREAK';           VKey:VK_CANCEL),
   (Name:'CAPSLOCK';        VKey:VK_CAPITAL),
   (Name:'CLEAR';           VKey:VK_CLEAR),
   (Name:'DEL';             VKey:VK_DELETE),
   (Name:'DELETE';          VKey:VK_DELETE),
   (Name:'DOWN';            VKey:VK_DOWN),
   (Name:'END';             VKey:VK_END),
   (Name:'ENTER';           VKey:VK_RETURN),
   (Name:'ESC';             VKey:VK_ESCAPE),
   (Name:'ESCAPE';          VKey:VK_ESCAPE),
   (Name:'F1';              VKey:VK_F1),
   (Name:'F10';             VKey:VK_F10),
   (Name:'F11';             VKey:VK_F11),
   (Name:'F12';             VKey:VK_F12),
   (Name:'F13';             VKey:VK_F13),
   (Name:'F14';             VKey:VK_F14),
   (Name:'F15';             VKey:VK_F15),
   (Name:'F16';             VKey:VK_F16),
   (Name:'F2';              VKey:VK_F2),
   (Name:'F3';              VKey:VK_F3),
   (Name:'F4';              VKey:VK_F4),
   (Name:'F5';              VKey:VK_F5),
   (Name:'F6';              VKey:VK_F6),
   (Name:'F7';              VKey:VK_F7),
   (Name:'F8';              VKey:VK_F8),
   (Name:'F9';              VKey:VK_F9),
   (Name:'HELP';            VKey:VK_HELP),
   (Name:'HOME';            VKey:VK_HOME),
   (Name:'INS';             VKey:VK_INSERT),
   (Name:'LEFT';            VKey:VK_LEFT),
   (Name:'NUMLOCK';         VKey:VK_NUMLOCK),
   (Name:'PGDN';            VKey:VK_NEXT),
   (Name:'PGUP';            VKey:VK_PRIOR),
   (Name:'PRTSC';           VKey:VK_PRINT),
   (Name:'RIGHT';           VKey:VK_RIGHT),
   (Name:'SCROLLLOCK';      VKey:VK_SCROLL),
   (Name:'TAB';             VKey:VK_TAB),
   (Name:'UP';              VKey:VK_UP)
  );

  {Extra VK constants missing from Delphi's Windows API interface}
  VK_NULL=0;
  VK_SemiColon=186;
  VK_Equal=187;
  VK_Comma=188;
  VK_Minus=189;
  VK_Period=190;
  VK_Slash=191;
  VK_BackQuote=192;
  VK_LeftBracket=219;
  VK_BackSlash=220;
  VK_RightBracket=221;
  VK_Quote=222;
  VK_Last=VK_Quote;

  ExtendedVKeys : set of byte =
  [VK_Up,
   VK_Down,
   VK_Left,
   VK_Right,
   VK_Home,
   VK_End,
   VK_Prior,  {PgUp}
   VK_Next,   {PgDn}
   VK_Insert,
   VK_Delete];

const
  INVALIDKEY = $FFFF {Unsigned -1};
  VKKEYSCANSHIFTON = $01;
  VKKEYSCANCTRLON = $02;
  VKKEYSCANALTON = $04;
  UNITNAME = 'SendKeys';
var
  UsingParens, ShiftDown, ControlDown, AltDown, FoundClose : Boolean;
  PosSpace : Byte;
  I, L : Integer;
  NumTimes, MKey : Word;
  KeyString : String[20];

procedure DisplayMessage(Message : PChar);
begin
  MessageBox(0,Message,UNITNAME,0);
end;

function BitSet(BitTable, BitMask : Byte) : Boolean;
begin
  Result:=ByteBool(BitTable and BitMask);
end;

procedure SetBit(var BitTable : Byte; BitMask : Byte);
begin
  BitTable:=BitTable or Bitmask;
end;

Procedure KeyboardEvent(VKey, ScanCode : Byte; Flags : Longint);
var
  KeyboardMsg : TMsg;
begin
  keybd_event(VKey, ScanCode, Flags,0);
  If (Wait) then While (PeekMessage(KeyboardMsg,0,WM_KEYFIRST, WM_KEYLAST, PM_REMOVE)) do begin
    TranslateMessage(KeyboardMsg);
    DispatchMessage(KeyboardMsg);
  end;
end;

Procedure SendKeyDown(VKey: Byte; NumTimes : Word; GenUpMsg : Boolean);
var
  Cnt : Word;
  ScanCode : Byte;
  NumState : Boolean;
  KeyBoardState : TKeyboardState;
begin
  If (VKey=VK_NUMLOCK) then begin
    NumState:=ByteBool(GetKeyState(VK_NUMLOCK) and 1);
    GetKeyBoardState(KeyBoardState);
    If NumState then KeyBoardState[VK_NUMLOCK]:=(KeyBoardState[VK_NUMLOCK] and not 1)
    else KeyBoardState[VK_NUMLOCK]:=(KeyBoardState[VK_NUMLOCK] or 1);
    SetKeyBoardState(KeyBoardState);
    exit;
  end;

  ScanCode:=Lo(MapVirtualKey(VKey,0));
  For Cnt:=1 to NumTimes do
    If (VKey in ExtendedVKeys)then begin
      KeyboardEvent(VKey, ScanCode, KEYEVENTF_EXTENDEDKEY);
      If (GenUpMsg) then
        KeyboardEvent(VKey, ScanCode, KEYEVENTF_EXTENDEDKEY or KEYEVENTF_KEYUP)
    end else begin
      KeyboardEvent(VKey, ScanCode, 0);
      If (GenUpMsg) then KeyboardEvent(VKey, ScanCode, KEYEVENTF_KEYUP);
    end;
end;

Procedure SendKeyUp(VKey: Byte);
var
  ScanCode : Byte;
begin
  ScanCode:=Lo(MapVirtualKey(VKey,0));
  If (VKey in ExtendedVKeys)then
    KeyboardEvent(VKey, ScanCode, KEYEVENTF_EXTENDEDKEY and KEYEVENTF_KEYUP)
  else KeyboardEvent(VKey, ScanCode, KEYEVENTF_KEYUP);
end;

Procedure SendKey(MKey: Word; NumTimes : Word; GenDownMsg : Boolean);
begin
  If (BitSet(Hi(MKey),VKKEYSCANSHIFTON)) then SendKeyDown(VK_SHIFT,1,False);
  If (BitSet(Hi(MKey),VKKEYSCANCTRLON)) then SendKeyDown(VK_CONTROL,1,False);
  If (BitSet(Hi(MKey),VKKEYSCANALTON)) then SendKeyDown(VK_MENU,1,False);
  SendKeyDown(Lo(MKey), NumTimes, GenDownMsg);
  If (BitSet(Hi(MKey),VKKEYSCANSHIFTON)) then SendKeyUp(VK_SHIFT);
  If (BitSet(Hi(MKey),VKKEYSCANCTRLON)) then SendKeyUp(VK_CONTROL);
  If (BitSet(Hi(MKey),VKKEYSCANALTON)) then SendKeyUp(VK_MENU);
end;

{Implements a simple binary search to locate special key name strings}

Function StringToVKey(KeyString : ShortString) : Word;
var
  Found, Collided : Boolean;
  Bottom, Top, Middle : Byte;
begin
  Result:=INVALIDKEY;
  Bottom:=1;
  Top:=MaxSendKeyRecs;
  Found:=false;
  Middle:=(Bottom+Top) div 2;
  Repeat
    Collided:=((Bottom=Middle) or (Top=Middle));
    If (KeyString=SendKeyRecs[Middle].Name) then begin
       Found:=True;
       Result:=SendKeyRecs[Middle].VKey;
    end else begin
       If (KeyString>SendKeyRecs[Middle].Name) then Bottom:=Middle
       else Top:=Middle;
       Middle:=(Succ(Bottom+Top)) div 2;
    end;
  Until (Found or Collided);
  If (Result=INVALIDKEY) then DisplayMessage('Invalid Key Name');
end;

procedure PopUpShiftKeys;
begin
  If (not UsingParens) then begin
    If ShiftDown then SendKeyUp(VK_SHIFT);
    If ControlDown then SendKeyUp(VK_CONTROL);
    If AltDown then SendKeyUp(VK_MENU);
    ShiftDown:=false;
    ControlDown:=false;
    AltDown:=false;
  end;
end;

begin
  AllocationSize:=MaxInt;
  Result:=false;
  UsingParens:=false;
  ShiftDown:=false;
  ControlDown:=false;
  AltDown:=false;
  I:=0;
  L:=StrLen(SendKeysString);
  If (L>AllocationSize) then L:=AllocationSize;
  If (L=0) then Exit;

  While (I<L) do begin
    case SendKeysString[I] of
    '(' : begin
            UsingParens:=True;
            Inc(I);
          end;
    ')' : begin
            UsingParens:=False;
            PopUpShiftKeys;
            Inc(I);
          end;
    '%' : begin
             AltDown:=True;
             SendKeyDown(VK_MENU,1,False);
             Inc(I);
          end;
    '+' :  begin
             ShiftDown:=True;
             SendKeyDown(VK_SHIFT,1,False);
             Inc(I);
           end;
    '^' :  begin
             ControlDown:=True;
             SendKeyDown(VK_CONTROL,1,False);
             Inc(I);
           end;
    '{' : begin
            NumTimes:=1;
            If (SendKeysString[Succ(I)]='{') then begin
              MKey:=VK_LEFTBRACKET;
              SetBit(Wbytes(MKey)[1],VKKEYSCANSHIFTON);
              SendKey(MKey,1,True);
              PopUpShiftKeys;
              Inc(I,3);
              Continue;
            end;
            KeyString:='';
            FoundClose:=False;
            While (I<=L) do begin
              Inc(I);
              If (SendKeysString[I]='}') then begin
                FoundClose:=True;
                Inc(I);
                Break;
              end;
              KeyString:=KeyString+Upcase(SendKeysString[I]);
            end;
            If (Not FoundClose) then begin
               DisplayMessage('No Close');
               Exit;
            end;
            If (SendKeysString[I]='}') then begin
              MKey:=VK_RIGHTBRACKET;
              SetBit(Wbytes(MKey)[1],VKKEYSCANSHIFTON);
              SendKey(MKey,1,True);
              PopUpShiftKeys;
              Inc(I);
              Continue;
            end;
            PosSpace:=Pos(' ',KeyString);
            If (PosSpace<>0) then begin
               NumTimes:=StrToInt(Copy(KeyString,Succ(PosSpace),Length(KeyString)-PosSpace));
               KeyString:=Copy(KeyString,1,Pred(PosSpace));
            end;
            If (Length(KeyString)=1) then MKey:=vkKeyScan(KeyString[1])
            else MKey:=StringToVKey(KeyString);
            If (MKey<>INVALIDKEY) then begin
              SendKey(MKey,NumTimes,True);
              PopUpShiftKeys;
              Continue;
            end;
          end;
    '~' : begin
            SendKeyDown(VK_RETURN,1,True);
            PopUpShiftKeys;
            Inc(I);
          end;
    else  begin
             MKey:=vkKeyScan(SendKeysString[I]);
             If (MKey<>INVALIDKEY) then begin
               SendKey(MKey,1,True);
               PopUpShiftKeys;
             end else DisplayMessage('Invalid KeyName');
             Inc(I);
          end;
    end;
  end;
  Result:=true;
  PopUpShiftKeys;
end;

{AppActivate

This is used to set the current input focus to a given window using its
name.  This is especially useful for ensuring a window is active before
sending it input messages using the SendKeys function.  You can specify
a window's name in its entirety, or only portion of it, beginning from
the left.

}

var
  WindowHandle : HWND;

function EnumWindowsProc(WHandle: HWND; lParam: LPARAM): BOOL; export; stdcall;
const
  MAX_WINDOW_NAME_LEN = 80;
var
  WindowName : array[0..MAX_WINDOW_NAME_LEN] of char;
begin
  {Can't test GetWindowText's return value since some windows don't have a title}
  GetWindowText(WHandle,WindowName,MAX_WINDOW_NAME_LEN);
  Result := (StrLIComp(WindowName,PChar(lParam), StrLen(PChar(lParam))) <> 0);
  If (not Result) then WindowHandle:=WHandle;
end;

function AppActivate(WindowName : PChar) : boolean;
begin
  try
    Result:=true;
    WindowHandle:=FindWindow(nil,WindowName);
    If (WindowHandle=0) then EnumWindows(@EnumWindowsProc,Integer(PChar(WindowName)));
    If (WindowHandle<>0) then begin
      SendMessage(WindowHandle, WM_SYSCOMMAND, SC_HOTKEY, WindowHandle);
      SendMessage(WindowHandle, WM_SYSCOMMAND, SC_RESTORE, WindowHandle);
    end else Result:=false;
  except
    on Exception do Result:=false;
  end;
end;

end.