Invalid argument (Converted from VB.Net)

Midnight Ahri

i'm new in C#, i converted some code from my previous project and i have an error here. i've put arrows between the code, i believe AppBarSettings type is APPBARDATA, but why it's still error? :confused: TBAppBar class below,

public class TBAppBar
{
[DllImport("shell32", EntryPoint = "SHAppBarMessage", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int GetAppBarMessage(int dwMessage, ref APPBARDATA pData);
[DllImport("shell32", EntryPoint = "SHAppBarMessage", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int SetAppBarMessage(int dwMessage, ref APPBARDATA pData);

        //Get Message Sent By App Bar

        //Send Message To App BAr

        private struct APPBARDATA
        {
            //AppBar Structure
            public int cbSize;
            public int hwnd;
            public int uCallbackMessage;
            public int uEdge;
            public Rectangle rc;
            public int lParam;
        }

        //Get Current State
        private const Int32 ABM\_GETSTATE = 0x4;
        //Get TaskBar Position
        private const Int32 ABM\_GETTASKBARPOS = 0x5;
        //Apply Setting(s)
        private const Int32 ABM\_SETSTATE = 0xa;
        //Autohide
        private const Int32 ABS\_AUTOHIDE = 0x1;
        //Always on Top
        private const Int32 ABS\_ALWAYSONTOP = 0x2;

        private bool TBAppBAutoHide;

        private bool TBAppBarAlwaysOnTop;
        public TBAppBar()
        {
            this.GetState();
            //Get Current State
        }


        private void GetState()
        {
            APPBARDATA AppBarSetting = new APPBARDATA();
            //What Setting?

            AppBarSetting.cbSize = Marshal.SizeOf(AppBarSetting);
            //Initialise

      --->  Int32 AppBarState = GetAppBarMessage(ABM\_GETSTATE, AppBarSetting); <---
            //Get Current State

            switch (AppBarState)
            {
                case 0:
                    //Nothing Set
                    TBAppBAutoHide = false;
                    TBAppBarAlwaysOnTop = false;

                    break;
                case ABS\_ALWAYSONTOP:
                    //Always On Top

Lost User

Midnight Ahri wrote:

error here.

Are we supposed to guess what the error is? Probably should be: Int32 AppBarState = GetAppBarMessage(ABM_GETSTATE, ref AppBarSetting);

Why is common sense not common? Never argue with an idiot. They will drag you down to their level where they are an expert. Sometimes it takes a lot of work to be lazy Please stand in front of my pistol, smile and wait for the flash - JSOP 2012

Midnight Ahri

well, it works sweetly. i thought using Option Strict ON will make it easy to convert to C#. but even C# is more strict than VB.Net. thank you very much, i've got to learn more about C#. :)

Dave Kreskowiak

Good guess! :)

A guide to posting questions on CodeProject[^]
Dave Kreskowiak