C#

void Test() {
	List<Thread> threads=new List<Thread>();
	for(int i=0; i<4; i++) {
		Thread t=createThread("T"+i);
		threads.Add(t);
	}
	for(int i=0; i<100; i++) {
		Thread.Sleep(300);
		Console.WriteLine("tick "+i);
		foreach(Thread t in threads) {
			Console.WriteLine("Thread "+t.Name+": state = "+t.ThreadState);
		}
	}
}
 
Thread createThread(string name) {
	Thread t=new Thread(new ThreadStart(runner));
	t.IsBackground=true;
	t.Priority=ThreadPriority.BelowNormal;
	t.Name=name;
	t.Start();
	return t;
}
 
void runner() {
	for(int j=0; j<100; j++) {
		// use debug build (Release might throw out the following line)
		for(int i=0; i<100000000; i++) { }	// long loop
		Thread.Sleep(1000);
	}
}

Karma Komae wrote:

Do you have any other idea ?

toolStripLabel1.Image = global::MyProject.Properties.Resources.CloseImg;

int StartX = (e.Location.X > mrctRectangle.X ? e.Location.X : mrctRectangle.X);
int StartY = (e.Location.Y > mrctRectangle.Y ? e.Location.Y : mrctRectangle.Y);
int EndX = (e.Location.X < mrctRectangle.X ? e.Location.X : mrctRectangle.X);
int EndY = (e.Location.Y < mrctRectangle.Y ? e.Location.Y : mrctRectangle.Y);

xMin= x1<=x2 ? x1 : x2;
width= x1+x2-xMin -xMin;    // x1+x2-xMin is xMax!