Screen flicker when switching active monitor

[Ophelius]

I have software I made that I use primarily on my 2nd monitor in full screen. When I click away to my main monitor, my program flickers black for 1/4 of sec, and flickers again when clicking back into it. Any way around this? It's not the end of the world, but it's slightly annoying.

Here's how I declare and render:

Init:

Code: QB64: [Select]

1.    
2.     SCREEN _NEWIMAGE(ScreenW, ScreenH, 32)
3.  
4.     VPage = _NEWIMAGE(ScreenW, ScreenH, 32)
5.    
6.     BG = _NEWIMAGE(ScreenW, ScreenH, 32)
7.  
8.     _FULLSCREEN
9.  
10.  

Mainloop:

Code: QB64: [Select]

1.  
2.     _DEST VPage
3.     _PUTIMAGE , BG, VPage
4.  
5.     'main loop code
6.  
7.     _PUTIMAGE , VPage, 0
8.  
9.     _LIMIT 60
10.  
11.  

Any help would be appreciated. Thanks

[bplus]

_DISPLAY is usually the cure for flickers but that's usually used in a loop and whenever you want to update the _DISPLAY of the screen. You have to remember when using it, that you have to use _DISPLAY every time you want to show some printing or new drawing.

Turn it off with _AUTODISPLAY default mode that draws or prints things immediately.

[Ophelius]

Thank you, but there's no flickering when the program is active, only for a brief moment when clicking away from the program onto my main monitor, and once more when clicking back into it.

I tried this example from the help:

Code: QB64: [Select]

1. CONST MenuHeight = 200
2.  
3. SCREEN _NEWIMAGE(640, 480, 32)
4. 'SLEEP 1
5. LOCATE 20
6. DO
7.     _LIMIT 30
8.     DisplayMenu
9.     k = _KEYHIT
10.     IF k <> 0 THEN PRINT k,
11. LOOP UNTIL k = 32 OR k = 27
12.  
13. SUB DisplayMenu
14. STATIC init, MS_HW AS LONG
15. IF NOT init THEN
16.     init = -1
17.     MS = _NEWIMAGE(640, MenuHeight, 32) 'MenuScreen image
18.     D = _DEST: _DEST MS
19.     CLS , &HFFAAAAAA 'background color gray
20.     _PRINTSTRING (20, 2), "Menu Test" 'image text
21.     MS_HW = _COPYIMAGE(MS, 33) 'create the MenuScreen_HardWare image
22.     _FREEIMAGE MS
23.     _DEST D
24. END IF
25. _PUTIMAGE (0, 0)-(640, MenuHeight), MS_HW
26. _DISPLAY
27. END SUB  
28.  

and it does the same thing, so there's probably nothing I can do. It doesn't do this with other full screen programs when I click back and forth between monitors, so I thought it might of been how I was rendering. Thanks

[bplus]

Yeah when you said 2 monitors I said "Oh boy!"

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