dllimport

[majkinetor <majkinetor@...>]

Hello there.
 
I am using dllimport v0.0001 alpha lua library by Jas Latrix


I have one small problem and I am asking for your help.
 
I am trying to execute this code:
 
> ---------------------------------------------------------------------------------------------------
> require "dllimport"
> GetDC = dllimport("USER32","GetDC","P=P")
> TextOut = dllimport("GDI32", "TextOut", "I=PiiPi")
>  
> h = GetDC(0)
> print("DC: ", h)
>
> text = "some cool text"
> h = TextOut( h, 0, 0, text, string.len(text) )
> print("RES: ", h)
> ---------------------------------------------------------------------------------------------------
 
Used API functions:
> BOOL TextOut(
> >   HDC hdc,           // handle to DC
> >   int nXStart,       // x-coordinate of starting position
> >   int nYStart,       // y-coordinate of starting position
> >   LPCTSTR lpString,  // character string
> >   int cbString       // number of characters
> );
> HDC GetDC(
> >   HWND hWnd   // Handle to the window whose DC is to be retrieved.                  If this value is NULL, GetDC retrieves the DC for the entire screen. 
> );

The problem here is that TextOut doesn't draw on the Desktop for some reason:.
I don't see why. 
 
The similar script works in AutoHotKey automatition language:
> h := DllCall("GetDC", "uint", 0)
> text := "some cool text"
> DllCall("TextOut", "uint", h, "int", 0, "int", 0, "str", text, "int", strlen(text))
 
What do I do wrong here ? All examples in help file do work without problems. 
Moreover, while I was experimenting with different parameters, lua did draw once the screen, but I accidently closed editor without saving the script, so I lost it..... so it passed, but now I can't repeat that. Also, return value of the API is 1 meaning that it was succesiful, and when I provide errorneous parameters it returns 0 as expected. 
 
I also tried to put s for a string instead P (I=Piisi) but I get error about illegal 4th parameter....
 
 
Maybe you can provide some insight what went wrong here.
PS: I don't know where I downloaded dllimport and I can't find it now, but if you need it I can upload somwhere.

 
Thx 
Miodrag

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