API SetPixel

[layer]

hey folks, i got the API SetPixel working!!! im really excited but i need to know how to make the SetPixel only apply for a certain control? is this possible? i hope so

[layer]

from what i see, that only gets the DC of a window, not a control... is there something i missed?

thanks for the help

-layer

[CyberSlug]

from what i see, that only gets the DC of a window, not a control... is there something i missed?

thanks for the help

-layer

<{POST_SNAPBACK}>

It's my understanding that "controls" are "windows." Keep this in mind when reading the Win32 API. Try it out

[layer]

alright, i think i got it, but it's not working still...

Global $draw
$dc = DLLCall ("user32.dll", "int", "GetDC", "hwnd", $draw)
$draw = GUICtrlCreateLabel("", 125, 215, 50, 50, $SS_SUNKEN)

maybe i have to chnage the "hwnd" part to something else?

could someone point me in the right direction?

thanks

Edited January 30, 2005 by layer

[Valik]

alright, i think i got it, but it's not working still...

Global $draw
$dc = DLLCall ("user32.dll", "int", "GetDC", "hwnd", $draw)
$draw = GUICtrlCreateLabel("", 125, 215, 50, 50, $SS_SUNKEN)

maybe i have to chnage the "hwnd" part to something else?

could someone point me in the right direction?

thanks

<{POST_SNAPBACK}>

If there was a "Stop before you hurt yourself" emoticon, I would point you towards that. Seriously, what is your logic on how that code should work? How the hell do you get something's DC.... well, anything actually... without actually creating it first?

[layer]

haha, sucks for you two i tryed creating it first... mwah ahahaha, the first time ive prooved you guys wrong i just didnt post that code, but i just missed the part ControlGetHandle.. if i would known bout that.. i woudln't have asked this!

thanks

Edited January 30, 2005 by layer

[Valik]

Then it shows how stupid you are if you posted dumb code like that when you knew it was wrong. Proud of yourself now?

[layer]

excuse me if i may be acting braindead to you guys... but this doesn't work:

$draw = GUICtrlCreateLabel("", 125, 215, 50, 50, $SS_SUNKEN)
$hwnd= ControlGetHandle ($main, "", $draw)
$dc = DLLCall ("user32.dll", "int", "GetDC", "hwnd", $hwnd)

ok, yell at me, curse at me, but only if you tell me why this doesnt work

EDIT: and yes, i do have the release DC and the setpixel calls in there

Edited January 30, 2005 by layer

[CyberSlug]

Sigh. You have consistently offered code fragments devoid of any useful context information.

Im taking bets if the bug is forgetting the array index on $dc

Since you didn't even tell us what your DllCall to SetPixel looks like, I found this related thread so I could code the following example in about 10 seconds:

EDIT: Well, Larry beat me to it.

#include <GuiConstants.au3>
$main = GuiCreate("blah")
GuiSetState()

$draw = GUICtrlCreateLabel("", 125, 215, 50, 50, $SS_SUNKEN)
$hwnd= ControlGetHandle ($main, "", $draw)
$dc = DLLCall ("user32.dll", "int", "GetDC", "hwnd", $hwnd)

; because it can be hard to see an individal pixel, lets draw a bunch
$color = 0x0000FF;red
For $xcoord = 1 to 10
    For $ycoord = 1 to 10
        DllCall("gdi32","long","SetPixel", "long", $dc[0], "long", $xcoord, "long", $ycoord, "long", $color)
    Next
Next

;Don't forget to release:
DLLCall("user32.dll","int","ReleaseDC","hwnd",0,"int",$dc[0])

While GuiGetMsg() <> $GUI_EVENT_CLOSE
Wend

Edited January 30, 2005 by CyberSlug

[layer]

doh! i didnt have the realease DC after the loop...