Jack of all trades, master of some…

It’s great! what I am looking for. I have modified your code to make it movable but when I have done that change the Mouse click event is not firing can you help me in this here is complete code:

///
/// Resizable and Movable Panel
///
public partial class ResizablePanel : Panel
{
// Do Resize parent or not
private Boolean _ResizeParent;

///
/// This class is native call class in which Win32 related constant and function are declared
///
private class NativeCalls
{
[DllImport("USER32.DLL", EntryPoint = "SendMessage")]
public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, ref int lParam);
[DllImport("user32")]
public static extern int ReleaseCapture(IntPtr hwnd);
public const int WM_SYSCOMMAND = 0×0112;
public const int SC_DRAGMOVE = 0xF012;
public const int SC_DRAGSIZE_N = 0xF003;
public const int SC_DRAGSIZE_S = 0xF006;
public const int SC_DRAGSIZE_E = 0xF002;
public const int SC_DRAGSIZE_W = 0xF001;
public const int SC_DRAGSIZE_NW = 0xF004;
public const int SC_DRAGSIZE_NE = 0xF005;
public const int SC_DRAGSIZE_SW = 0xF007;
public const int SC_DRAGSIZE_SE = 0xF008;

// This are required for Move Functionality
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HTCAPTION = 2;
}

///
/// Resize parent or Not
///
public Boolean ResizeParent
{
get { return _ResizeParent; }
set { _ResizeParent = value; }
}

///
/// Constructor for Resizable Panel
///
public ResizablePanel()
{
InitializeComponent();
MinimumSize = new Size(50, 50);
Margin = new Padding(0, 0, 0, 0);
Padding = new Padding(0, 0, 3, 3);
BackColor = SystemColors.ControlLight;
}

// Enum which indicate in which direction need to resize
private enum MousePos {NoWhere, Left, Right, Top, Bottom, BottomRight,Middle}

///
/// Get Movuse Position based on that we will decide which action need to perform
///
///
///
private MousePos GetMousePos(Point location)
{
MousePos result = MousePos.NoWhere;

Rectangle TestRect;

int LeftSize = Padding.Left;
int RightSize = Padding.Right;
int TopSize = Padding.Top;
int BottomSize = Padding.Bottom;

// Resize left border
TestRect = new Rectangle(Width – LeftSize, 0, Width – LeftSize, Height – BottomSize);
if (TestRect.Contains(location)) result = MousePos.Left;

// Resize right border
TestRect = new Rectangle(Width – RightSize, 0, Width – RightSize, Height – BottomSize);
if (TestRect.Contains(location)) result = MousePos.Right;

// Resize bottom border
TestRect = new Rectangle(0, Height – BottomSize, Width – RightSize, Height);
if (TestRect.Contains(location)) result = MousePos.Bottom;

// Resize bottom Corner
TestRect = new Rectangle(Width – RightSize, Height -BottomSize, Width, Height);
if (TestRect.Contains(location)) result = MousePos.BottomRight;

// Move For Middle Mouse
TestRect = new Rectangle(10, 10, Width – 20, Height – 20);
if (TestRect.Contains(location)) result = MousePos.Middle;

return result;
}

///
/// Mouse down event of the Panel
///
///
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);

IntPtr hwnd = this.Handle;

if ((ResizeParent) && (this.Parent != null) && (this.Parent.IsHandleCreated))
{
hwnd = Parent.Handle;
}

int nul = 0;
MousePos mousePos = GetMousePos(e.Location);
switch (mousePos)
{
case MousePos.Left:
{
NativeCalls.ReleaseCapture(hwnd);
NativeCalls.SendMessage(hwnd, NativeCalls.WM_SYSCOMMAND, NativeCalls.SC_DRAGSIZE_W, ref nul);
} break;
case MousePos.Right:
{
NativeCalls.ReleaseCapture(hwnd);
NativeCalls.SendMessage(hwnd, NativeCalls.WM_SYSCOMMAND, NativeCalls.SC_DRAGSIZE_E, ref nul);
} break;
case MousePos.Bottom:
{
NativeCalls.ReleaseCapture(hwnd);
NativeCalls.SendMessage(hwnd, NativeCalls.WM_SYSCOMMAND, NativeCalls.SC_DRAGSIZE_S, ref nul);
} break;
case MousePos.BottomRight:
{
NativeCalls.ReleaseCapture(hwnd);
NativeCalls.SendMessage(hwnd, NativeCalls.WM_SYSCOMMAND, NativeCalls.SC_DRAGSIZE_SE, ref nul);
} break;
case MousePos.Middle:
{
NativeCalls.ReleaseCapture(hwnd);
NativeCalls.SendMessage(hwnd, NativeCalls.WM_NCLBUTTONDOWN, NativeCalls.HTCAPTION, ref nul);
} break;
}
}

///
/// Mouse move event of the panel
///
///
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);

MousePos mousePos = GetMousePos(e.Location);
switch (mousePos)
{
case MousePos.Left: Cursor = Cursors.SizeWE; break;
case MousePos.Right: Cursor = Cursors.SizeWE; break;
case MousePos.Bottom: Cursor = Cursors.SizeNS; break;
case MousePos.BottomRight: Cursor = Cursors.SizeNWSE; break;
case MousePos.Middle: Cursor = Cursors.Hand; break;
default: Cursor = Cursors.Default; break;
}
}

///
/// Mouse move event of the panel
///
///
protected override void OnPreviewKeyDown(PreviewKeyDownEventArgs e)
{
MessageBox.Show(”Clicked!”);
base.OnPreviewKeyDown(e);

}

///
/// Set Resize bound for the panel
///
///
protected override void OnResize(EventArgs eventargs)
{
base.OnResize(eventargs);
if (this.Width < this.MinimumSize.Width) this.Width = this.MinimumSize.Width;
if (this.Height < this.MinimumSize.Height) this.Height = this.MinimumSize.Height;
}

///
/// Mouse Leave event of the Panel
///
///
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
Cursor = Cursors.Default;
}
}