$hWnd ? (understood at last)

[Mat]

Right now i'm trying to set an image as a button, this is the script from the help file;

#Include <GuiButton.au3>
_GUICtrlButton_SetImage([u][b]$hWnd[/b][/u], $sImageFile[, $nIconId = -1[, $fLarge = False]])

here is my script:

$Start = _GUICtrlButton_Create("Start", -1, 0, 65, 30, $BS_BITMAP)
   _GUICtrlButton_SetImage(????????, $Start, $sPath & "\Start.bmp")

everything else is fine - except The "Handle to the control".

sorry for being a noob

Mdiesel

Edited March 2, 2009 by mdiesel

[jvanegmond]

$Start = _GUICtrlButton_Create("Start", -1, 0, 65, 30, $BS_BITMAP)
   _GUICtrlButton_SetImage($Start, $sPath & "\Start.bmp")

So.

[Mat]

Error:

Invalid Window handle for _GUICtrlButton_Create 1st parameter

[GaryFrost]

Error:

Invalid Window handle for _GUICtrlButton_Create 1st parameter

Your missing the handle to the gui for the 1st param

[Mat]

Your missing the handle to the gui for the 1st param

.... I guessed almost that much....

what I was trying to ask is what the value should be...

If someone could give it to me in english it would be nice too...

[Melba23]

mdiesel,

This is my understanding of how it works - the purists will probably find it lacking, but it will do for you and me.;-)

When you create "something" in Windows, it is identified by a "handle" - a unique identifier so that everyone/everything knows how to address the "something".

When you create "something" in Autoit, it is given a "ControlID", unique to that script - and of course Windows gives it a "handle" as well.

You can determine the handle from the ControlID (WinGetHandle & ControlGetHandle) and the ControlID from the handle (_WinAPI_GetDlgCtrlID).

Internally, Autoit usually uses the ControlID, so in the case you posted:

$Start = _GUICtrlButton_Create("Start", -1, 0, 65, 30, $BS_BITMAP)
   _GUICtrlButton_SetImage(????????, $Start, $sPath & "\Start.bmp")

you need to use the ControlID of the button, which you have stored in $Start. So you need (as Manadar explained):

$Start = _GUICtrlButton_Create("Start", -1, 0, 65, 30, $BS_BITMAP)
   _GUICtrlButton_SetImage($Start, $sPath & "\Start.bmp")

Because AutoIt is a very pleasant language to use, you can also use "-1" to refer to the last ControlID, so you could code:

$Start = _GUICtrlButton_Create("Start", -1, 0, 65, 30, $BS_BITMAP)
   _GUICtrlButton_SetImage(-1, $sPath & "\Start.bmp")

I am afraid that there is a degree of confusion between the use of ControlID and handle in AutoIt (I just know I am going to get flamed for that, but it is true!). Normally, builtin AutoIt functions use the ControlID, but some UDFs use the Windows handle. A good UDF allows you to use either by checking with IsHwnd and doing any conversion for you.

Still awake? Ask if anything is unclear, but I cannot guarantee you a better answer. :-)

M23

[GaryFrost]

A lot to say and still not the reason for the error.

The user used the UDF function to create the button, tried to. It requires the handle to the gui where as the built-in function does not.

[Mat]

Thanks a lot - that works now...

not quite sure why or how - but i'll leave that up to the people who know what they're talking about.

thanks again,

Mdiesel

oh, and i was missing the handle for the line before...

Edited March 2, 2009 by mdiesel

[Melba23]

GaryFrost,

Guilty as charged.....but at least I tried to explain.

M23