VB.NET; HDC difference since VB6?

**leoiser** · Jan 29 '08, 04:14 AM

just put Handle instead of Picturebox.Hand le , hope it will work ...

Originally posted by SanderK

Hello,

In VB6, I have a certain function that draws a 'tileset' to a picturebox. The function is from a self-written API in C++. This is how it is written in VB6;

Code:

        Private Declare Function GFXdrawTileset Lib "actkrt3.dll" ( _
                                            ByVal file As String, _
                                            ByVal hdc As IntPtr, _
                                            ByVal startIdx As Integer, _
                                            ByVal pxWidth As Integer, _
                                            ByVal pxHeight As Integer, _
                                           ByVal isometric As Boolean) As Long

The code works. Now I declared it like this in VB.NET;

Code:

     <DllImport("C:\Program Files\Toolkit3\actkrt3.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
        Private Shared Function GFXdrawTileset( _
                                            ByVal file As String, _
                                            ByVal hdc As IntPtr, _
                                            ByVal startIdx As Integer, _
                                            ByVal pxWidth As Integer, _
                                            ByVal pxHeight As Integer, _
            <MarshalAs(UnmanagedType.Bool)> ByVal isometric As Boolean) As Integer

    End Function

I'm 100% certain all parameters are correct; except for the hdc one. I simply tried "Picturebox.Han dle", and even "GetDC(Pictureb ox.Handle)" (declared GetDC from user32.dll), but it's not working.

Does anyone know if there's a difference in VB.NET that I don't know about which can cause this?

Thanks.

VB.NET; HDC difference since VB6?

VB.NET; HDC difference since VB6?

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