How is it possible to know when a WM_LBUTTONDOWN occurs, what control has been hit by the mouse cursor ?

My main window (builded with ressources) have a Radasm Image control. I want to know if (when the user press the left mouse button) the mouse cursor have hit the image control.

.elseif eax==WM_LBUTTONDOWN
; Left button mouse is down
; test to see if cursor is inside the image control
movzx esi,word ptr [lParam]
movzx edi,word ptr [lParam+2]

At that point I don't know what to do next... I've done some try with GetClientRect and GetWindowRect and some other APIs, but it's very confusing for me, between screen/window coordinates and Rect/point structures.

I'm lost :cry:

Thank you very much.

Regards, Neitsa.
Posted on 2005-01-18 00:19:13 by Neitsa
hi Neitsa
you can set a new window proc for the Radasm Image control with the SetWindowLong Api call like this :

OldImageProc dd ?
.elseif eax==WM_CREATE
invoke SetWindowLong,hControl,GWL_WNDPROC,offset ImageProc
mov OldImageProc,eax

and handle those messages sended to the control with a new proc like this :

ImageProc proc hWin:HWND,uMsg:DWORD,wParam:DWORD,lParam:DWORD
mov eax,uMsg
...... stuff to do
invoke WindowProc,offset OldImageProc,hWin,uMsg,wParam,lParam
ImageProc endp

hope this help
Posted on 2005-01-18 09:50:15 by GR33d
Damn !

I haven't think about that ! I'm sure it will work, I must say a big thank you Gr33d :D

Btw, I'm also curious, and if someone have an idea about that question, without a new window proc... I'll be glad to ear it !

Anyway, thank you very much Gr33d :)

Regards, Neitsa.
Posted on 2005-01-18 11:12:43 by Neitsa
How about this!

local pt:POINT
local rect:RECT
.elseif eax==WM_LBUTTONDOWN
invoke GetCursorPos,addr pt
invoke GetWindowRect,hControl,addr rect
invoke PtInRect,addr rect,pt.x,pt.y
.if eax
ur code...
Posted on 2005-01-18 21:54:47 by masm8
im not shore but the WM_LBUTTONDOWN message is sent to the own window...
if i click on the control, the control will receive the message .... so its gunna be necessary to use the SetWindowLong stuff...
i guess is like that
Posted on 2005-01-19 09:28:08 by GR33d
Haven't tested yet both of your codes (overload of work :( ) but I'll test it as sooner as I can.

Once it will be tested I'll tell you if it works.

Thank you.

Regards, Neitsa.
Posted on 2005-01-19 12:21:50 by Neitsa

finally I have tried both of your code (reading again the Iczelion tutorial #31) but wasn't able to have a working cursor hit test... :oops: (I think this is my fault, not yours).

Anyway, asking a friend about that problem, is gave me a simple answer :

- just add SS_NOTIFY style to the control

Damn it works !

.elseif eax==WM_COMMAND
mov eax,wParam
shr eax,16
.if eax==STN_CLICKED
mov eax,wParam
.if ax==IDC_IMG1
;code when the image control is clicked


Btw, thanks a lot for your help !

Regards, Neitsa.
Posted on 2005-01-22 11:05:06 by Neitsa