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Windows API Reference

The following topics provide information about the programming elements included in the Windows API.

Build date: 3/25/2010

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FAQ

A MessageBox to save

I suppose we all have wondered how do some softawares ask to save before exiting. Here's a simple code to do that.
If you have better than mine, thank you for telling me, I will add it.
As always, I'll comment after.
Here's the prototype:

void beforeExiting (int, int);

Here is the function body:

void beforeExiting (int close, int order)
{
    int resul = 0;
    if (close == 0)
   {
        if (command == 0)
        resul = MessageBox (MainWindow, "File not saved. Do you want to save before exiting?", "Warning!" MB_ICONWARNING |MB_YESNOCANCEL);

        else if (command == 1)
        resul = MessageBox (MainWindow, "File not saved. Do you want to save before exiting?", "Warning!" MB_ICONWARNING | MB_YESNO);

        if (result == IDNO) exit (0);
        else if (result == IDYES) (SendMessage (fenetrePrincipale, WM_COMMAND, ID_ENR, 0) exit (0);)
   }
    else
    exit (0);
}

Here's where to call:

case ID_LEAVE:
            beforeExiting (close, 0);

case WM_DESTROY:
           beforeExiting (close, 1);

And that's it!
This code gives a message backup before leaving with yes and no if it has already closed the window, yes, no and cancel if the window still exists.
"Close" is determined as follows: If you save, turn passes to 1. If the text window should redraw itself, close goes to 0.

The method is simple: when a control should redraw itself, it sends a message with its own ID. Simply assign an ID to the edit control to monitor and add a box for him. I show you:

case WM_COMMAND:
            switch (LOWORD (wParam))
           {
                 IDC_CHILD_EDIT box:
                 close = 0;
                 break;
                 ID_B_USE box:
                 .
                 .
                 .

IDC_CHILD_EDIT which is the ID that I have attributed to the control to follow.
Use it well

History

10/3/2010
greg2