How to Print a Screenshot
How to Print Screen
Locate and Press the PrtScn on your system

Save the Captured Screenshot
Open Paint by clicking the Start button , clicking All Programs, clicking Accessories, and then clicking Paint.

In Paint, on the Home tab, in the Clipboard group, click Paste.

Click the Paint button , and then click Save.

How to capture an active window

Hold down the Alt key and Press the PrtScn on your system
Open Paint by clicking the Start button , clicking All Programs, clicking Accessories, and then clicking Paint.
In Paint, on the Home tab, in the Clipboard group, click Paste.
Click the Paint button , and then click Save.
How to paste an image from the clipboard
The Clipboard.GetImage() Method help you to save the graphics from the clipboard.
Paste From ClipBoard using C#using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Bitmap clipboardImage = (Bitmap)Clipboard.GetImage(); clipboardImage.MakeTransparent(); string imagePath = "C:\\Users\\xxxxx\\Pictures\\new.bmp"; clipboardImage.Save(imagePath); } } }Paste From ClipBoard using VB.Net
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim imagePath As String Dim clipboardImage As Bitmap = CType(Clipboard.GetImage, Bitmap) clipboardImage.MakeTransparent() imagePath = "C:\Users\xxxxx\Pictures\new.bmp" clipboardImage.Save(imagePath) End Sub End Class
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