Very Computer

Hello,

I am writing a solitare type game and have a couple of questions about
loading bitmaps from a *.res file.  I have been loading the bitmaps
sequentially into a single variable of type HBitmap when the program
needs to display them.  The problem is that I don't think that the
HBitmap variable is being reused properly.  When I exit the application,
a certain percentage of the windows resources reported by the Program
Manager are gone.  What does the program need to do in order to reuse
the variable?  When I use DeleteObject, the program crashes with a stack
error.  Should I just load all of the bitmaps into an array?
I am using TPW 1.5

Thanks in advance,

        You *must* ensure that you have de-selected the object *before*
        you delete it.

        HBITMAP old_hbitmap,hbitmap;
                hbitmap=....this is the bitmap you have loaded
                old_hbitmap=SelectObject(hdc,hbitmap);
                ...
                SelectObject(hdc,old_hbitmap);
                DeleteObject(hbitmap);

        If you are already doing that, then I have no other ideas.
--

Airborne Geophysics
Geological Survey of Canada, Ottawa

|> Hello,
|>
|> I am writing a solitare type game and have a couple of questions about
|> loading bitmaps from a *.res file.  I have been loading the bitmaps
|> sequentially into a single variable of type HBitmap when the program
|> needs to display them.  The problem is that I don't think that the
|> HBitmap variable is being reused properly.  When I exit the application,
|> a certain percentage of the windows resources reported by the Program
|> Manager are gone.  What does the program need to do in order to reuse
|> the variable?  When I use DeleteObject, the program crashes with a stack
|> error.  Should I just load all of the bitmaps into an array?
|> I am using TPW 1.5
|>
|> Thanks in advance,

I'm not sure if this going to work, however I have encountered the
aforementioned crashes as well.

The problem is that you are trying to delete an object that has not been
created.  In order to overcome this, in your Init constructor initialize all
HBitmaps to nil (ie: QueenOfHearts := nil;.)  Then in your Done destructor test
to see if the variable is nil, and if not then you know that you have
created (allocated space for) that object (ie: if QueenOfHearts <> nil then
DeleteObject (QueenOfHearts).)  Sorry if my syntax is incorrect.

Hope this helps.

Best regards,
Mihcael Vincze