library Versatile;
uses
Windows,
Messages,
SysUtils;
type
PHookRec = ^THookRec;
THookRec =
record
AppHnd: Integer;
MemoHnd: Integer;
end;
var
Hooked: Boolean;
hKeyHook, hMemo, hMemFile, hApp: HWND;
PHookRec1: PHookRec;
function KeyHookFunc(Code, VirtualKey, KeyStroke: Integer): LRESULT;
stdcall;
var
KeyState1: TKeyBoardState;
AryChar:
array[0..1]
of Char;
Count: Integer;
begin
Result := 0;
if Code = HC_NOREMOVE
then Exit;
Result := CallNextHookEx(hKeyHook, Code, VirtualKey, KeyStroke);
if Code < 0
then Exit;
if Code = HC_ACTION
then
begin
if ((KeyStroke
and (1
shl 30)) <> 0)
then
if not IsWindow(hMemo)
then
begin
hMemFile := OpenFileMapping(FILE_MAP_WRITE, False, '
Versatile_mapping');
PHookRec1 := MapViewOfFile(hMemFile, FILE_MAP_WRITE, 0, 0, 0);
if PHookRec1 <>
nil then
begin
hMemo := PHookRec1.MemoHnd;
hApp := PHookRec1.AppHnd;
end;
end;
if ((KeyStroke
and (1
shl 30)) <> 0)
then
begin
GetKeyboardState(KeyState1);
Count := ToAscii(VirtualKey, KeyStroke, KeyState1, AryChar, 0);
if VirtualKey = VK_F4
then
begin
PostMessage(hApp, WM_USER + 8765, 300 , 0);
end;
if Count = 1
then
begin
PostMessage(hApp, WM_USER + 8765, Ord(AryChar[0]), 0);
end;
end;
end;
// ........
end;
// procedure
function StartHook(MemoHandle, AppHandle: HWND): Byte;
export;
begin
Result := 0;
if Hooked
then
begin
Result := 1;
Exit;
end;
if not IsWindow(MemoHandle)
then
begin
Result := 4;
Exit;
end;
hKeyHook := SetWindowsHookEx(WH_KEYBOARD, KeyHookFunc, hInstance, 0);
if hKeyHook > 0
then
begin
hMemFile := CreateFileMapping($FFFFFFFF,
// $FFFFFFFF gets a page memory file
nil,
// no security attributes
PAGE_READWRITE,
// read/write access
0,
// size: high 32-bits
SizeOf(THookRec),
// size: low 32-bits
//SizeOf(Integer),
'
Versatile_mapping');
// name of map object
PHookRec1 := MapViewOfFile(hMemFile, FILE_MAP_WRITE, 0, 0, 0);
hMemo := MemoHandle;
PHookRec1.MemoHnd := MemoHandle;
hApp := AppHandle;
PHookRec1.AppHnd := AppHandle;
{set the Memo and App handles to the mapped file}
Hooked := True;
end
else
Result := 2;
end;
function StopHook: Boolean;
export;
begin
if PHookRec1 <>
nil then
begin
UnmapViewOfFile(PHookRec1);
CloseHandle(hMemFile);
PHookRec1 :=
nil;
end;
if Hooked
then
Result := UnhookWindowsHookEx(hKeyHook)
else
Result := True;
Hooked := False;
end;
procedure EntryProc(dwReason: DWORD);
begin
if (dwReason = Dll_Process_Detach)
then
begin
if PHookRec1 <>
nil then
begin
UnmapViewOfFile(PHookRec1);
CloseHandle(hMemFile);
end;
UnhookWindowsHookEx(hKeyHook);
end;
end;
exports
StartHook,
StopHook;
begin
PHookRec1 :=
nil;
Hooked := False;
hKeyHook := 0;
hMemo := 0;
DLLProc := @EntryProc;
EntryProc(Dll_Process_Attach);
end.