HarmonyOS 如何禁止截屏和录屏？

  let windowClass = windowStage.getMainWindowSync()     
globalThis.mainWindow = windowClass

import window from '@ohos.window'  
@Entry  
@Component  
struct Page32 {  
  @State message: string = 'Hello World'  
  mainWindow :window.Window = globalThis.mainWindow  
  build() {  
    Row() {  
      Column() {  
        Text(this.message)  
          .fontSize(50)  
          .fontWeight(FontWeight.Bold)  
      }  
      .width('100%')  
    }  
    .height('100%')  
  }  
  onPageShow(){  
   this.mainWindow.setWindowPrivacyMode(true)  
  }  
  onPageHide(){  
    this.mainWindow.setWindowPrivacyMode(false)  
  }  
}