news:1142857399.991272.237850@t31g2000cwb.googlegroups.com...
> Hello,
> I have a form that I don't want to display the title bar for. The way
> I've implemented this is to to remove the WS_DLGFRAME style flag.
> However, when this form is minimized and then restored, it is restored
> to the wrong size. The height of the form increases 19 pixels (height
> of a title bar on my computer) with every minimize/restore.
>
> Can someone shead any light on this?
>
> I've attached an example program. To reproduce, just create a standard
> windows forms project, paste the code, and add a button to the form
> whose click handler you connect to the button1_Click method.
>
> public partial class Form1 : Form
> {
>  public Form1()
>  {
>     InitializeComponent();
>  }
>
>  // Attach this to a button click event for a button on the form
>  private void button1_Click(object sender, EventArgs e)
>  {
>     if (IsStyleFlagSet(this.Handle, WS_DLGFRAME))
>     {
>        // Remove caption bar
>        SetStyleFlag(this.Handle, WS_DLGFRAME , false);
>        // Repaint NC area
>        SetWindowPos(this.Handle, IntPtr.Zero, 0, 0, 0, 0,
> SWP_FRAMECHANGED |  SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER);
>    }
>
>    // Get my current client size
>   Size prevSize = this.ClientSize;
>
>   // Minimize and restore me
>   this.WindowState = FormWindowState.Minimized;
>   this.WindowState = FormWindowState.Normal;
>
>   // Get my client size now
>   Size currSize = this.ClientSize;
>
>   if (currSize == prevSize)
>     MessageBox.Show("Size was equal! :-) ");
>   else
>     MessageBox.Show(string.Format("Size was not equal! :-(. Before:
> {0}, After: {1}", prevSize, currSize));
>
> }
>
>
>  // Style constants
>  internal const int GWL_STYLE = (-16);
>
>  internal const int WS_DLGFRAME = 0x00400000;
>  internal const int WS_BORDER = 0x00800000;
>  internal const int WS_CAPTION = WS_BORDER | WS_DLGFRAME;
>
>  // SetWindowPos Flags
>  internal const int SWP_NOSIZE = 0x0001;
>  internal const int SWP_NOMOVE = 0x0002;
>  internal const int SWP_NOZORDER = 0x0004;
>  internal const int SWP_NOACTIVATE = 0x0010;
>  internal const int SWP_FRAMECHANGED = 0x0020;
>  internal const int SWP_NOOWNERZORDER = 0x0200;
>
>  [DllImport("user32.dll")]
>  static extern int SetWindowLong(IntPtr hWnd, int nIndex, int
> dwNewLong);
>
>  [DllImport("user32.dll", SetLastError = true)]
>  static extern int GetWindowLong(IntPtr hWnd, int nIndex);
>
>  [DllImport("user32")]
>  internal static extern int SetWindowPos(IntPtr hWnd, IntPtr
> hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
>
>  internal static bool IsStyleFlagSet(IntPtr handle, int styleFlag)
>  {
>    return (GetWindowLong(handle, GWL_STYLE) & styleFlag) == styleFlag;
>  }
>
>  internal static void SetStyleFlag(IntPtr handle, int dwNewLong, bool
> set)
>  {
>    int style = GetWindowLong(handle, GWL_STYLE);
>
>    if (set)
>      style |= dwNewLong;
>    else
>      style &= ~dwNewLong;
>
>    SetWindowLong(handle, GWL_STYLE, style);
>  }
> }
>