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static extern int SHQueryUserNotificationState(
out QUERY_USER_NOTIFICATION_STATE pquns);
Declare Function SHQueryUserNotificationState Lib "shell32.dll" (TODO) As int
// Define other methods and classes here
public enum UserNotificationState
/// A screen saver is displayed, the machine is locked,
/// or a nonactive Fast User Switching session is in progress.
NotPresent = 1,
/// A full-screen application is running or Presentation Settings are applied.
/// Presentation Settings allow a user to put their machine into a state fit
/// for an uninterrupted presentation, such as a set of PowerPoint slides, with a single click.
Busy = 2,
/// A full-screen (exclusive mode) Direct3D application is running.
RunningDirect3dFullScreen = 3,
/// The user has activated Windows presentation settings to block notifications and pop-up messages.
PresentationMode = 4,
/// None of the other states are found, notifications can be freely sent.
AcceptsNotifications = 5,
/// Introduced in Windows 7. The current user is in "quiet time", which is the first hour after
/// a new user logs into his or her account for the first time. During this time, most notifications
/// should not be sent or shown. This lets a user become accustomed to a new computer system
/// without those distractions.
/// Quiet time also occurs for each user after an operating system upgrade or clean installation.
QuietTime = 6
static extern int SHQueryUserNotificationState(out UserNotificationState userNotificationState);
public static UserNotificationState State()
var returnVal = SHQueryUserNotificationState(out state);
The SHQueryUserNotificationState API
9/1/2015 11:17:47 AM - -22.214.171.124
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