C# クリップボードの画像を、即プリンタ出力する。
ユーザ名・コンピュータ名・日時も付与。
clip2print.cs
//c:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /target:exe clip2print.cs
using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Printing;

class clip2print
{
	static void Main()
	{
		System.Threading.Thread t = new System.Threading.Thread(GetClipboardText);
		t.SetApartmentState(System.Threading.ApartmentState.STA);
		t.Start();
		t.Join();
	}

	private static void pd_PrintPage(object sender,
		System.Drawing.Printing.PrintPageEventArgs e)
	{
		Image img = System.Windows.Forms.Clipboard.GetImage();
		Console.WriteLine("img 高さ:{0} 幅:{1}", img.Height, img.Width);
		Rectangle r = e.MarginBounds;
		double rr = (double)r.Height / (double)r.Width;
		double ir = (double)img.Height / ((double)img.Width+1);
		Console.WriteLine("rr:{0} ir:{1}", rr, ir);
		if(rr < ir){
			if(r.Height > img.Height){
				r.Width = img.Width;
				r.Height = img.Height;
				Console.WriteLine("1");
			}else{
				double rt = (double)r.Height/(double)img.Height;
				r.Width = (int)(rt*(double)img.Width);
				r.Height = (int)(rt*(double)img.Height);
				Console.WriteLine("2");
			}
		}else{
			if(r.Width > img.Width){
				r.Width = img.Width;
				r.Height = img.Height;
				Console.WriteLine("3");
			}else{
				double rt = (double)r.Width/(double)img.Width;
				r.Width = (int)(rt*(double)img.Width);
				r.Height = (int)(rt*(double)img.Height);
				Console.WriteLine("4");
			}
		}
		Console.WriteLine("X:{0} Y:{1}", e.MarginBounds.X, e.MarginBounds.Y);
		Console.WriteLine("高さ:{0} 幅:{1}", e.MarginBounds.Height, e.MarginBounds.Width);
		Console.WriteLine("上:{0} 左:{1}", e.MarginBounds.Top, e.MarginBounds.Left);
		Console.WriteLine("rw:{0} rh:{1}", r.Width, r.Height);
		e.Graphics.DrawImage(img,r);
		
		Font fnt = new Font("MS UI Gothic", 16);
		DateTime dt = DateTime.Now;
		e.Graphics.DrawString(Environment.UserName + " " + Environment.MachineName + " " + dt, fnt, Brushes.Blue, 0, 0);
		e.HasMorePages = false;
		img.Dispose();
	}

	static void GetClipboardText()
	{
		try{
			if (System.Windows.Forms.Clipboard.GetImage() != null)
			{
				Image img = System.Windows.Forms.Clipboard.GetImage();
				Bitmap sub1 = new Bitmap(img);
				System.Drawing.Printing.PrintDocument pd =
					new System.Drawing.Printing.PrintDocument();
				pd.PrintPage +=
					new System.Drawing.Printing.PrintPageEventHandler(pd_PrintPage);
				pd.Print();
			}else{
				Console.WriteLine("クリップボードに画像がない");
			}
		}
		catch(Exception ex){
			MessageBox.Show("エラー\n"+ex);
		}
	}
}