problems with simple graphics

[xandaz]

   I would like to know why the hell this isn't working. i have some examples of it but cant get it to work. Will someone please take a look?

[Mikl__]

Hi, xandaz!
Look Windows Creator --> Background

[xandaz]

   I dont think i understand and some of the files you uploaded seem to be damaged,

[daydreamer]

isnt it simpler to place all drawing code between GetDC and ReleaseDC and delete objects last in code?

Code Select Expand

.if wParam==MK_LBUTTON;
invoke CreatePen,PS_SOLID,4,ccolor.rgbResult
invoke SelectObject,hBackDC,eax
invoke DeleteObject,eax;???wrong place deleting object
mov eax,lParam
mov ebx,eax
movzx eax,ax
shr ebx,16
invoke LineTo,hBackDC,eax,ebx
invoke GetClientRect,hCanvas,addr rect
invoke InvalidateRect,hCanvas,addr rect,TRUE
.endif




https://docs.microsoft.com/en-us/windows/win32/gdi/drawing-with-the-mouse

[xandaz]

    Thanks... i got it to work but ccolor.rgbResult isn't returning any values... Why is that?

[xandaz]

   Sorry. My bad. I was creating the bitmap with the compatible dc instead of the window dc. Thats why it came in black and white. Thanks y'all