Context Menu

Hi, I was learning this Context Menu example based on an e-book where I've been supplied with this code

Code:

---

1: void CMenusDlg:: OnContextMenu(CWnd* pWnd, CPoint point)
 2: {
 3:    // TODO: Add your message handler code here
 4:   
 5:    ///////////////////////
 6:    // MY CODE STARTS HERE
 7:    ///////////////////////
 8:
 9:    // Declare local variables
10:    CMenu *m_lMenu;    // A pointer to the menu
11:    CPoint m_pPoint;    // A copy of the mouse position
12:
13:    // Copy the mouse position to a local variable
14:    m_pPoint = point;
15:    // Convert the position to a screen position
16:    ClientToScreen(&m_pPoint);
17:    // Get a pointer to the window menu
18:    m_lMenu - GetMenu();
19:    // Get a pointer to the first submenu
20:    m_lMenu = m_lMenu->GetSubMenu(0);
21:    // Show the Popup Menu
22:    m_lMenu->TrackPopupMenu(TPM_CENTERALIGN + TPM_LEFTBUTTON,
23:        m_pPoint.x, m_pPoint.y, this, NULL);
24:
25:    ///////////////////////
26:    // MY CODE ENDS HERE
27:    ///////////////////////

28: }

---

The compilation went smoothly except there are 2 warnings on line 18 and 20.

Nevertheless, the application runs, but when I do a right click on the form, it crashes.....

Any idea what's wrong with it?

Thanks for any help

Harddisk

PS:It's an MFC exe

Well if this code is the same way you have it then

Code:

---

18:    m_lMenu - GetMenu();

---

Its crashing because you are subtracting two pointers here instead of assigning one to the other... making it crash on the next line...

Code:

---

20:   
m_lMenu = m_lMenu->GetSubMenu(0);

---

When you try to use the invalid CMenu pointer...

I've tried to rename either and both of the lines, but my program still crashes on right click.

Please have a look at the particular chapter that I've attached.
*rename to *.htm

Thanks

Harddisk

Those pages are scanned with a text recognition algoritm, so code often gets mistyped, - on line 18 should be =

It's working now, except that the context menu appears way far to the bottom right.

Is there some wrong in my codes or the function ClientToScreen() doesnt work very well?

Thanks a lot!

Harddisk