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7.8

Delphi - detect a left/right mouse click anywhere on the screen.

Asked by edhasted in Delphi Programming

Tags: delphi, mouse, click, detect

Hopefully this will be my last posting on this subject :-).

With the help of the Delphi Experts I have put together a keyboard logger that records in a memo box anything the user types on the screen. This is for about 1,000 disabled internet students in and around London so that their remote tutors can see what they are actually typing. It all working swimmingly together with accurate renditions of the Num/Caps/Scroll Lock lights.

But what I am missing is the ability to see what mouse clicks have been pressed?

Any ideas?

Ed

p.s. Here's the code for the key stroke trapper DLL....

IBRARY KeyHandler;
uses
Windows,
Messages;

CONST
CM_SEND_KEY = WM_USER + $1000;

VAR
Keybrd: HHook;
MemFile: THandle;
Reciever: ^Integer;

Function HookCallBack(Code: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
{This is the CallBack function called by the Hook}
Begin
{if a key was pressed/released}
if (code = HC_ACTION) then begin
{attempt to map to MemFile}
MemFile := OpenFileMapping(FILE_MAP_READ, False, 'KeyReciever');
{if mapping successful, send keypress to receiver application}
if (MemFile <> 0) then begin
Reciever := MapViewOfFile(MemFile, FILE_MAP_READ, 0, 0, 0);
PostMessage(Reciever^, CM_SEND_KEY, wParam, lParam);
UnmapViewOfFile(Reciever);
CloseHandle(MemFile);
end;
end;
{call to next hook of the chain}
Result := CallNextHookEx(Keybrd, Code, wParam, lParam)
End;

Procedure HookOn; stdcall;
{procedure to install the hook}
Begin
Keybrd := SetWindowsHookEx(WH_KEYBOARD, @HookCallBack, HInstance, 0);
End;

Procedure HookOff; stdcall;
{procedure to uninstall the hook}
Begin
UnhookWindowsHookEx(Keybrd);
End;

EXPORTS

{ Export the following Procedures/Functions }

HookOn,
HookOff;

BEGIN
END.

Get your answer NOW

20091111-EE-VQP-89

Delphi - detect a left/right mouse click anywhere on the screen.

Asked by edhasted in Delphi Programming

Tags: delphi, mouse, click, detect

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