Reset cursor in WM_SETCURSOR handler properly

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C++

Win32

INTRODUCTION AND RELEVANT INFORMATION:

I have made an application that needs to change the look of a cursor into hand when mouse hovers above the static control, but resets it to a normal cursor otherwise.

My initial application was in full screen mode, but recently terms have changed and it must have a resizable window.

This means that my handler for WM_SETCURSOR must be rewritten to reflect newly introduced changes.

Cursors are loaded in WM_CREATE, and I have defined class cursor, like this:

// cursors 
case WM_CREATE:
	hCursorHand = LoadCursor( NULL, IDC_HAND );
	hCursorArrow = LoadCursor( NULL, IDC_ARROW );
        // other stuff

In my class:

WNDCLASSEX wc;
// ...
wc.hCursor = hCursorArrow;
//...

This is my old WM_CURSOR handler ( code is simplified for clarity purposes ):

case WM_SETCURSOR:
   if( (HWND)wParam == GetDlgItem( hwnd, 4000 ) ) 
       SetCursor(hCursorHand);
   else
       SetCursor(hCursorArrow);
   return TRUE;

If cursor hovers above static control, then my handler changes it to hand, else sets it to default cursor ( arrow ).

Below is the link to the picture I have sketched in Paint that displays the desired look of the cursor when it hovers above static control, it is on the client area, and when user resizes window.

http://pbrd.co/1fXQDvh[^]

If additional code snippets are required, ask and I will edit my post, but for now, they are omitted to keep the post short and concise.

I work on Windows XP, using MS Visual Studio C++ and pure Win32 API.

MY EFFORTS TO SOLVE PROBLEM:

Bellow are the code snippets that I have tried, but they all failed:

First snippet:

case WM_SETCURSOR:
   if( (HWND)wParam == GetDlgItem( hwnd, 4000 ) ) 
   {
      SetCursor(hCursorHand); 
      return TRUE; 
    }
    else
      return DefWindowProc( hWnd, msg, lParam, wParam );

Second Snippet:

case WM_SETCURSOR:
   if( (HWND)wParam == GetDlgItem( hwnd, 4000 ) ) 
   {
      SetCursor(hCursorHand); 
      return TRUE; 
    }
    break; // based on MSDN example

Third snippet:

case WM_SETCURSOR:
    if( (HWND)wParam == GetDlgItem( hwnd, 4000 ) ) 
    {
       SetCursor(hCursorHand); 
       return TRUE; 
    }
    else
       return FALSE;

These set cursor to hand no matter where it is.

If I leave my WM_SETCURSOR handler unchanged, the only problem I get is that instead of sizing arrows, I get regular arrow ( as the cursor’s look ) when I hover over the border, but window can be sized.

If I comment out my WM_SETCURSOR handler, sizing arrows and cursor arrow appear properly, but cursor doesn’t change into hand when hovers above static control ( which is logical, since there is no WM_SETCURSOR handler to change it ).

I have browsed through SO archive, looked on MSDN, CodeProject , DaniWeb, Cprogramming and CodeGuru, but had no success.

Looking through those, I have found an example where people compare low word of the lParam against hit test code.

Looking through MSDN I have found link for hit test values ( http://msdn.microsoft.com/en-us/library/windows/desktop/ms645618%28v=vs.85%29.aspx[^] ) and I have found link for cursor types (http://msdn.microsoft.com/en-us/library/windows/desktop/ms648391%28v=vs.85%29.aspx[^] ).

Currently I am reading them, because I think that I will have to load additional cursor resources, take several comparisons of hit test values, and then use those resources to set cursor look accordingly.

QUESTION:

I really would like my WM_SETCURSOR handler to look like this:

case WM_SETCURSOR:
     if( (HWND)wParam == GetDlgItem( hwnd, 4000 ) ) 
     {
        SetCursor(hCursorHand); 
        return TRUE;
     }
     else
       // reset cursors look to default

so I ask the community to instruct me on how to do this.

If this isn’t possible, then I will consider using multiple if statements to check the hit test code, and set cursor’s look accordingly.

Of course, if there is better solution for my problem, please suggest it, I will consider it as well.

Thank you.

Regards.