Advanced Class Probe

.386
.model flat,stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\kernel32.inc
includelib \masm32\lib\kernel32.lib
include \masm32\include\user32.inc
includelib \masm32\lib\user32.lib

.const
WM_MOUSEHOOK equ WM_USER+6
WM_STOPHOOK equ WM_USER+5 ; this is added by me sanjit 
.data
hInstance dd 0

.data?
hHook dd ?
hWnd dd ?

.code
DllEntry proc hInst:HINSTANCE, reason:DWORD, reserved1:DWORD
	push hInst
	pop hInstance
      mov  eax,TRUE
      ret
DllEntry Endp

MouseProc proc nCode:DWORD,wParam:DWORD,lParam:DWORD
    .if(nCode < 0);modified by sanjit from the original code 
	invoke CallNextHookEx,hHook,nCode,wParam,lParam
	ret
	.endif

	.if(wParam == WM_RBUTTONDOWN);modified by sanjit from the original code
	  invoke PostMessage,hWnd,WM_STOPHOOK,0,0;stop the hook
	.endif
	
	mov edx,lParam
	assume edx:PTR MOUSEHOOKSTRUCT
	invoke WindowFromPoint,[edx].pt.x,[edx].pt.y
	invoke PostMessage,hWnd,WM_MOUSEHOOK,eax,0
	assume edx:nothing
	xor eax,eax
	
	invoke CallNextHookEx,hHook,nCode,wParam,lParam
	ret
MouseProc endp

InstallHook proc hwnd:DWORD
	push hwnd
	pop hWnd
	invoke SetWindowsHookEx,WH_MOUSE,addr MouseProc,hInstance,NULL
	mov hHook,eax
	ret 
InstallHook endp

UninstallHook proc
	invoke UnhookWindowsHookEx,hHook
	ret
UninstallHook endp

End DllEntry