DllCall, MessageBox?

[optiplex]

Hey

Just started with AutoIT scripting

Im trying to make a MsgBox using the MessageBox API ( http://msdn.microsoft.com/en-us/library/ms645505(VS.85).aspx )

Heres my code, I want to have a yes and a no button, but this code doesnt work :/

DllCall("user32.dll", "int", "MessageBoxA", "int", 0, "string", "Hey", "string", "Whats up?", "uint", "MB_YESNO")

I tried various things. I do get the messagebox, but not with the yes and no button.

I know u can easily use MsgBox(0, etc...), but I want to do it this way, so I can use the function DllCall for other APIs.

Thanks in advance

-optiplex

[SmOke_N]

"string" is not one of the "valid types". I'd suggest re-reading that section.

Also using the search feature of the forum could answer many of your questions:

http://www.autoitscript.com/forum/index.ph...st&p=531229

[optiplex]

"string" is not one of the "valid types". I'd suggest re-reading that section.

Also using the search feature of the forum could answer many of your questions:

http://www.autoitscript.com/forum/index.ph...st&p=531229

Thanks for the reply!

Okay, I got it working, but I dont see why its not working if u use "MB_YESNO" instead of "4"

[Siao]

AutoIt has MsgBox() so clueless ppl like you could create messagebox easily without the headaches of trying to figure out basic programming concepts such as data types and constants. I don't know why you are going against this. Now that AutoIt's MsgBox has parent hwnd parameter too, there's no reason to DllCall that API whatsoever.

Edited June 5, 2008 by Siao

[SkinnyWhiteGuy]

Thanks for the reply!

Okay, I got it working, but I dont see why its not working if u use "MB_YESNO" instead of "4"

That MB_YESNO is a constant defined in a C/C++ header file... that isn't defined in AutoIt. For more info, go on Google, and lookup "#define", and you'll see why it's not working the way you think it is.

[SmOke_N]

Thanks for the reply!

Okay, I got it working, but I dont see why its not working if u use "MB_YESNO" instead of "4"

Well, let's think about this.

1. You pass MB_YESNO as a string, but declare it as a unsigned integer.

2. In order to make things such as that work, you must declare them first:

ie...

Global Const $MB__YESNO = 4

$aVal = DllCall("user32.dll", "int", "MessageBox", "int", 0, "str", "Hey", "str", "Whats up?", "uint", $MB__YESNO)
MsgBox(64, "Info", "Value received from DLL MsgBox = " & $aVal[0])

Note the double underscore, because AutoIt already uses $MB_YESNO as a constant.