asked on

PostMessage and SendMessage are not working on Button

Hi All,

Can anybody explain me why any of SendMessage or PostMessage functions are not working on Button??
Do I made any mistake??

if( YesWnd != 0)
            {


                  h = YesWnd;
                  //SetWindowText(h,"Sudhakar");
                  //AfxMessageBox("1");


            //      SendMessage(h, BN_CLICKED, 0, 0);
                  PostMessage(h, WM_LBUTTONDOWN, 0, 0);
                  PostMessage(h, WM_LBUTTONUP, 0, 0);

            //      SendMessage(h, WM_LBUTTONDOWN, 0, 0);
            //      SendMessage(h, WM_LBUTTONUP, 0, 0);

                  PostMessage(h, BM_CLICK, 0, 0);
                  PostMessage(h, BN_CLICKED, 0, 0);

            //      SendMessage(h, BM_CLICK, 0, 0);
                  AfxMessageBox("1");

                  ok=true;


            }

Thanks
Sudhakar

P.S: I am able to set the window text for that button. But Mouse click events are not firing

Jaime Olivares

First of all. Why are you trying to do this?
I think it is not a good practice to force a button to be pressed programatically.

sudhakar_koundinya

ASKER

Yes I know that.
But my problem is with MS Outlook Security Warnings.

Actually I am developing a software for a recruiting company for which they are using MS Outlook for sending the mails to companies/consultants/contact persons.

So for this, I am developing both plugin and standalone application for tracking the mails.

When I try to communicate the Outlook mails or trying to send the mails using Outlook or trying to access Outlook addressbook I am getting those warnings

This problem is started from MS Outlook 2002 (SP2). So MS Outlook 2003 and 2002 stops functioning until user interacts wiith such warning dialogs.

As an example
http://support.microsoft.com/?kbid=842945

To get rid of such warnings I am writing this code

By looking at application clickYes at http://www.snapfiles.com/get/clickyes.html, I got this Idea

Here is my initial startup code

bool clickYes()
{

            HWND hwnd;
            hwnd = FindWindow(NULL, "Microsoft Outlook");
            if( hwnd == 0 )
            return false;
            //AfxMessageBox(GetWndText(hwnd));

            CString str;
            bool ok=false;

            HWND h = GetWindow(hwnd, GW_CHILD);
            HWND hButton=0;
            HWND checkWnd =0;
            HWND YesWnd =0;
            HWND comboWnd =0;

            while(true)
            {

                  if( GetWndClass(h) == "ComboBox" )
                  {
                        comboWnd = h;
                  }
                  else if (GetWndClass(h) == "Button" )
                  {

                        if (GetWndText(h) == "Yes" )
                        {
                              YesWnd = h;
                        }
                        else if (GetWndText(h) == "&Allow access for" )
                        {

                              checkWnd = h;
                        }
                  }

                  h = GetWindow(h, GW_HWNDNEXT);
                  if(h==NULL)
                        break;
            }
            if (checkWnd != 0)
            {

                  h = checkWnd;

                  if( SendMessage(             (HWND) h,             (UINT) BM_GETCHECK,             (WPARAM) 0,                         (LPARAM) 0            )==BST_UNCHECKED)
                  {

                        PostMessage(h, WM_LBUTTONDOWN, 0, 0);
                        PostMessage(h, WM_LBUTTONUP, 0, 0);
                  }
            }
            else
                  return false;

            if( comboWnd != 0)
            {

                  h = comboWnd;
                  SendMessage(h,CB_SELECTSTRING,-1,(WPARAM)"10 minutes");
            }
            else
                  return false;


            if( YesWnd != 0)
            {


                  h = YesWnd;
                  //SetWindowText(h,"Sudhakar");
                  //AfxMessageBox("1");


            //      SendMessage(h, BN_CLICKED, 0, 0);
                  PostMessage(h, WM_LBUTTONDOWN, 0, 0);
                  PostMessage(h, WM_LBUTTONUP, 0, 0);

            //      SendMessage(h, WM_LBUTTONDOWN, 0, 0);
            //      SendMessage(h, WM_LBUTTONUP, 0, 0);

                  PostMessage(h, BM_CLICK, 0, 0);
                  PostMessage(h, BN_CLICKED, 0, 0);

            //      SendMessage(h, BM_CLICK, 0, 0);
                  //AfxMessageBox("1");

                  ok=true;


            }
            else
                  return false;

                  h=hwnd;
                  PostMessage(h, WM_LBUTTONDOWN, 0, 0);
                  PostMessage(h, WM_LBUTTONUP, 0, 0);
                  PostMessage(h, BN_CLICKED, 0, 0);


            return ok;

}

ASKER CERTIFIED SOLUTION

Jaime Olivares

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sudhakar_koundinya

ASKER

jaime_olivares,
I am afraid to say that, it does not help me

But what I have identified is once posting the messages to Button("Yes"), If I click on My application or some other applications then PostMessage is able to post the message to "Yes" button and Microsoft Outlook Dialog is getting destroyed and application is executing perfectly with no problem.

Taking this observation into consideration, I have followed all the below methods to remove the focus from Microsoft Outlook Dialog. But it does not help me.

PostMessage(AfxGetApp()->m_pMainWnd->m_hWnd, WM_LBUTTONDOWN, MK_LBUTTON, MAKELPARAM(pt.x,pt.y));
PostMessage(AfxGetApp()->m_pMainWnd->m_hWnd, WM_LBUTTONUP, MK_LBUTTON, MAKELPARAM(pt.x,pt.y));

PostMessage(AfxGetApp()->m_pMainWnd->m_hWnd, BN_CLICKED, MK_LBUTTON, MAKELPARAM(pt.x,pt.y));

SetFocus(AfxGetApp()->m_pMainWnd->m_hWnd);

Any Idea??

sudhakar_koundinya

ASKER

And also what I have observed is MS Outlook dialog is Topmost window of all the desktop windows

Thanks
Sudhakar

Jaime Olivares

I think we are confusing who to send the message. Let's try with:
::PostMessage(YesWnd , BM_CLICK, 0,0);

sudhakar_koundinya

ASKER

No, it doesn't help :-(

sudhakar_koundinya

ASKER

BTW,

from the site http://www.outlookcode.com/d/sec.htm

It has below comment
Clicks the security dialog buttons automatically, but can be set to start in a suspended state. Developers can activate and suspend automatic clicking of the security dialogs programmatically. (HINT: Use &H2 instead of WM_CLOSE) Free.

Now what does &H2 mean??

Jaime Olivares

it refers to the ClickYes application, if you send a 0x02 (hex 2) message, but if don't know exact behaviour for this message (0x00 is for suspend and 0x01 is for resume).

sudhakar_koundinya

ASKER

can you post me a solution in which I need to post/send BN_Clicked message using SendMessage or PostMessage methods

I have tried like this. But they are not working.
SendMessage(h, WM_COMMAND, 0, BN_CLICKED);
PostMessage(h, WM_COMMAND, 0, BN_CLICKED);

SOLUTION

Jaime Olivares

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sudhakar_koundinya

ASKER

i Did similarly

::SendMessage(hwnd, WM_COMMAND, MAKELONG(GetDlgCtrlID(h), BN_CLICKED), h);
or
::PostMessage(hwnd, WM_COMMAND, MAKELONG(GetDlgCtrlID(h), BN_CLICKED), h);

But I Get following error

StdAfx.cpp
error C2664: 'SendMessageA' : cannot convert parameter 4 from 'struct HWND__ *' to 'long'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
error C2664: 'PostMessageA' : cannot convert parameter 4 from 'struct HWND__ *' to 'long'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
Error executing cl.exe.

SOLUTION

Jaime Olivares

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