BitBlt SRCINVERT

Hey
I have a form, and the user can doodle and do all kinds of stuff on it. However... I want to be able to invert the colour of the form. (its backcolour is white) And I don't wanna use the GetPixel; SetPixelV sorta thing, cause I already figured that one out and it takes yonks, and its way dodge 'ey...

If you know how to do it using BitBlt your a champ.. paste it here. :D

Oh n when u use bitBlt can the sourceDC and the DestinationDC be the same DC or do u need to make a copy of it to use as the sourceDC???

Thanx

Use the vbSrcInvert parameter (just pass that to bitblt)

u can read and write to the same picturebox with bitblt

Im doing that hey, using the defined constant from API but it's not inverting, lol. It just looks the same.

VB Code:

Public Const DSINVERT = &H550009
 
BitBlt Picture1.hdc, 0, 0, Picture1.Width, Picture1.Height, Picture1.hdc, 0, 0, DSINVERT

Try that

Yup, it worked...

Code:

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Public Const SRCINVERT = &H660046

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I was using that constant before... what is the difference between the two?