Problem with my custom control crashing the Windows Forms Designer

If i add my control with this.controls.add(Mycontrol) in form_load i have no problems but if i add it from the toolbox, the designer crashes.

Here is the code for my control:

enumScrollDirection { Up, Down };

publicpartialclassScrollingText :Control

privateint _LineSpacing;

privateTimer _timer;

Bitmap b;

int yPos;

ScrollDirection _direction;

int _scrollAmount;

bool _scrolling;

public ScrollingText()

{

InitializeComponent();

_LineSpacing = 2;

this.Text ="Testing Line #1";

for (int i = 0; i < 20; i++)

this.Text +="\nTesting Line #" + (i + 2);

this.Size =newSize(50, 50);

_timer =newTimer();

_timer.Interval = 100;

_timer.Tick +=newEventHandler(_timer_Tick);

_timer.Enabled =true;

_direction =ScrollDirection.Up;

_scrollAmount = 2;

_scrolling =true;

this.SetStyle(ControlStyles.DoubleBuffer,true);

this.SetStyle(ControlStyles.AllPaintingInWmPaint,true);

this.SetStyle(ControlStyles.UserPaint,true);

}

void SwitchColours()

{

Color c =this.BackColor;

this.BackColor =this.ForeColor;

this.ForeColor = c;

}

void _timer_Tick(object sender,EventArgs e)

{

if (_scrolling)

{

if (_direction ==ScrollDirection.Up)

{

yPos -= _scrollAmount;

if (yPos < (this.Height - b.Height))

{

_direction =ScrollDirection.Down;

yPos =this.Height - b.Height;

}

}

else

if (yPos > 0)

{

_direction =ScrollDirection.Up;

yPos = 0;

}

}

this.Invalidate();

this.Update();

}

}

publicSizeF CalculateSize(Graphics g,Font f,string[] s)

{

float maxWidth = 0f;

float maxHeight = 0f;

for (int i = 0; i < s.Length; i++)

{

SizeF size = g.MeasureString(s, f);

if (size.Width > maxWidth)

maxWidth = size.Width;

maxHeight += size.Height + _LineSpacing;

}

returnnewSizeF(maxWidth, maxHeight);

}

void DrawText(Graphics g,string s)

{

string[] lines = s.Split(newchar[] {'\n' } );

SizeF size = CalculateSize(g,this.Font, lines);

if (b !=null)

b.Dispose();

if (size.Width == 0f)

size.Width = 10f;

b =newBitmap((int)size.Width, (int)size.Height);

Graphics bufferGraphics =Graphics.FromImage(b);

using (Brush brush =newSolidBrush(this.ForeColor))

{

for (int i = 0; i < lines.Length; i++)

{

SizeF lineSize = bufferGraphics.MeasureString(lines,this.Font);

bufferGraphics.DrawString(lines,this.Font, brush,newPointF(0f, ((lineSize.Height + _LineSpacing) * i)));

}

}

}

protectedoverridevoid OnPaint(PaintEventArgs pe)

{

DrawText(pe.Graphics,this.Text);

if (b.Height <this.Height)

{

yPos = 0;

_scrolling =false;

}

pe.Graphics.DrawImage(b,newPoint(0, yPos));

// Calling the base class OnPaint

base.OnPaint(pe);

}

protectedoverridevoid OnMouseEnter(EventArgs e)

{

_scrolling =false;

base.OnMouseEnter(e);

}

protectedoverridevoid OnMouseLeave(EventArgs e)

{

_scrolling =true;

base.OnMouseLeave(e);

}

}

[11020 byte] By [ShanePoppleton] at [2007-12-22]