Button does not change into sprite graphic!

[geork]

Hey all!
  I'm trying to change a button's graphic to the graphic of a Dynamic Sprite within a function. I have read other posts, and tried to copy what they do, but strangely for me the button just turns up with a blank image. Here's the code:

Code: ags

 // At the top of the Global Script 
  DynamicSprite *s;

 // Later on...
 function bSave_OnClick(GUIControl *control, MouseButton button)
{
  s = DynamicSprite.CreateFromExistingSprite(31); //this is to test, I actually load another DynamicSprite's image
                                                                                // into this one...
  s.Resize(90, 60); //Optional, doesn't work with or without...
  bButton.NormalGraphic = s.Graphic;
  s.Delete();
  SaveGameSlot(btn, date); //these two are established elsewhere
  btn = 0;
  AfterSave(); //just does some business after the save
}

  I've even tried to reload an image into 's' and change the button's normal graphic in AfterSave() instead of bSave_OnClick, but no luck...
  Anyone have a solution?
   Thanks

[monkey0506]

You're deleting the sprite!

When you call DynamicSprite.Create you are creating a new sprite. When you call DynamicSprite.Delete you are deleting that sprite.

If you delete a file from your hard drive you can't very well expect to just keep using it.

You should only delete the sprite when you're done using it. For example, you're creating a new dynamic sprite every time the player clicks the bSave button, so you could add a check at the top of that function:

Code: ags

if (s != null) s.Delete();

But if you're deleting a sprite that is in-use by the button (bButton's normal graphic) then it's not going to work the way you want..

[geork]

 Thanks!
  It's working fine now. In the manual it always writes in big DELETE SPRITE ASAP!, which is why I always did it, now I finally get what it really means  
  Thanks again!

[monkey0506]

Well, in this case "ASAP" means "As Soon As You Are Done Actually Using The Sprite"