Using GetMsgProc WH_GETMESSAGE

Hi all,

i have hooked into an external applications messages and i want to post a message to my own user message to the bottom of the message queue. However the message whilst postmessage returns a number (i.e. its successful) the message isn't getting posted.

i create my hook like so;

Code:

---

appHook = SetWindowsHookEx(WH_CALLWNDPROC, (HOOKPROC)AppEventsHook, hinstDLL, GetWindowThreadProcessId(GetAppWnd(), NULL));

---

with my callback proc being

Code:

---

const static UINT WM_PRIVATE_MSG = RegisterWindowMessage("WM_PRIVATE_MSG");

LRESULT CALLBACK AppEventsHook (int nCode, WPARAM wParam, LPARAM lParam)
{
        try
        {
        if(nCode == HC_ACTION)
        {
                LPCWPSTRUCT pCwp = (LPCWPSTRUCT) lParam;

                if(pCwp->message == WM_PRIVATE_MSG)
                {
                        MessageBox(0, "Received message!", "Got it!", MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
                }
               
                switch(pCwp->message)
                {
                case WM_WINDOWPOSCHANGED:
                        {PostMessage(pCwp->hwnd,WM_PRIVATE_MSG,NULL,NULL);
}
}
return CallNextHookEx(appHook,nCode,wParam,lParam);

---

ok now i have hooked into the right window i can read all events such as WM_WINDOWPOSCHANGING etc. I have also tried posting a user message like so i.e.

Code:

---

PostMessage(pCwp->hwnd, WM_USER+10,0,0);

---

and trying to catch this in the switch statement. Again ith no luck.

I'm running on Windows server 2003 coudl this make a difference?

any ideas?

many thanks,

matt.