Re: Blitting (VB enquiry)

["Gerco Dries" <gerco@gdries.demon.nl>]

I used BitBlt in my vb program as well, worked like a charm, but I didn't
blit onto a vb form (or a vb anything for that matter), it was for a
screensaver preview in the control panel applet.

I guess the advice would be: Don't blit onto a vb form (or a vb anything for
that matter). Use the vb functions instead, or don't use vb at all.

Gerco Dries.
----- Original Message -----
From: "Tom Webb" <tom@thewebb.screaming.net>
To: <gameprogrammer@gameprogrammer.com>
Sent: Saturday, September 16, 2000 11:28 AM
Subject: Blitting (VB enquiry)


> Hi all,
>
> I am having a total nightmare trying to incorporate blitting into my
> program. I have a large picture box to represent the planets surface and a
> small picture box to hold the graphic I want to blit onto the planets
> surface. I run my blitting routine and nothing happens, no errors and no
> blitting! :-0! I have been working on it for nearly a week now and am sure
> there is a simple explaination for it. But for the life of me I cannot
find
> it!
>
> I beg you to put me out of my misery and give me a hand :-)
>
> The form is called main, the picture boxes are called picPlanet (the
> planets surface) and picBuilding (the image I want to blit onto the
planets
> surface).
>
> Here is the code.
>
> Private Sub sprite_paint(x As Integer)
> 'Subroutine to paint a building
> 'x = the counter
>
> 'declarations
> Dim retcode As Integer 'dummy return code
> Dim xpix 'temporary x coord in pixel
> Dim ypix 'temporary y coord in pixel
>
> 'inits
> xpix = dx
> ypix = dy
>
> 'now blit the sprite
> retcode = BitBlt(Main.picPlanet.hdc, (Building(x).x), (Building(x).y), dx,
> dy, Main.picBuilding.hdc, xpix, ypix, SRCCOPY)
> End Sub
>
> 'The type declarations
>
> Type BuildingType
>     Name As String * 20             'The buildings name
>     owner As Integer                'The buildings owner
>     x As Integer                    'X location of the building
>     y As Integer                    'Y location of the building
>     Type As Integer                 'The buildings type
>     Maximum_Capacity As Integer     'The maximum storage capacity of the
> building
>     Amount As Integer               'The Amount stored in the building
>     Production As Integer           'The production of the building
>     Maximum_Health As Integer       'The maximum health of the building
>     Health As Integer               'The current health of the building
>     Size As Integer                 'How big is the building
>     Maximum_Soldiers As Integer     'The maximum number of soldiers
>     Soldiers As Integer             'The current amount of soldiers
>     Soldier_Type As Integer         'The type of of soldiers
> End Type
>
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