What is HandleEventParms?

[plinydogg]

What is "HandleEventParms?" It is used in the "Form based Hello World" tutorial but I can't find any info about it. If you type in "HandleEventParms" in Google, the only link is to this forum. Is it part of a library file or something?

Thanks in advance.

[kornalius]

HandleEventParms is a special PPL define. It is used to create variables out of wParam$ and lParam$ variables for most of the common events. You don't have to use it and can deactivate it in the PIDE if need be.

[MagNet]

So that means that I can get w/lParam from for instance the LBUTTONDOWN event without using that event?

[plinydogg]

Add whatever you guys are talking about to my tutorial requests =).

[kornalius]

:) wParam and LParam are parameters that are passed to event functions. Windows uses these values to store different values when passing parameters to an event function.

func MyEvent(hWnd$, Msg$, wParam$, lParam$)
end;

When MyEvent is called, hWnd$ contains the form handle of the event, Msg$ the event message number and wParam$ and lParam$ can serve for multiple purposes (like X and Y values of a WM_MOUSEDOWN event, the key pressed for a WM_KEYDOWN event, etc...)

We didn't invent that, it's straight from how Windows does it.

We will try to simplify things a bit more as we go. The simplified event handling system is offering a simpler interface but I think it can be simplified a bit more.