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Resolved longptr param in dw other() event
  1. Issue
0 Votes
  1. Miguel Leeuwe
  2. PowerBuilder
  3. Friday, 24 April 2020 10:32 AM UTC

Hi,

I have this code in a dw's other() event. I've stripped out most of the code, just to illustrate.

// v1 and v2, mjl, 13/04/20: Since win8 and w10 totally ignore the mouse settings when working remotely, I've re-introduced the code to scroll:

CONSTANT Long WM_MOUSEWHEEL = 522
CONSTANT Longptr WM_OUTLOOK_DROP = 111

CHOOSE CASE wparam
		
	CASE WM_MOUSEWHEEL
		RETURN  1 

	CASE WM_OUTLOOK_DROP // email dropped from Outlook?
		RETURN 0
		
END CHOOSE

RETURN 0

There's no problem at all when scrolling with the mousewheel

Now, since the wparam really is a longptr, I decided to define my WM_MOUSEWHEEL also as such.

Result is first I don't see anything on the dw untill I scroll a bit and then I can scroll down, but cannot scroll up.

I've reported this as a private bug, since my video which accompanies it holds private data, but the only answer I've gotten (which I do appreciate), is that on 32bit, longptr's are interpreted as long at runtime. So far, It's not being considered as a possible bug. Fine, the explanation is good, but it doesn't make sense, since I'm comparing a longptr with a longptr in the choose case (after having changed the WM_MOUSEWHEEL constant to longptr).

In our full application based on pfc classes, everything just freezes / hangs.

Has anyone else have the idea that this is a bug or should I just have some more rum on my birthday?

Please watch this video which shows how to reproduce my case:

https://credica-my.sharepoint.com/:v:/g/personal/miguel_credica_co_uk/EVNNppx5VItDk2k3rJqj8X4Bf1a92EZjK6meexudOvLqrQ?e=HMB4Aw

I'll now also publish this as a public possible bug.

 

Resolve invalid (in time) child datawindow in a data from th... Themes and fonts
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