How to take screenshots in winapp driver .

It is same as the normal webdriver script . You can use dependency in your pom.xml or build.gradle https://mvnrepository.com/artifact/commons-io/commons-io

The code

@Test
public void screenshot() throws IOException{
// you need import org.apache.commons.io.FileUtils so add org.apache.commons.io dependency
File scrFile=((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
//Captures mean the folder in java project location
FileUtils.copyFile(scrFile, new File(System.getProperty("user.dir")+"\\test-output\\"+"\\Captures\\"+"myScreenshot"+".png"));
System.out.println("myScreenshot.png is generated go to  directory to check");
}