setTaskBarState(state: Integer);
The setTaskBarState method of the Form class sets the state of the taskbar icon for the application.
If the method is called:
On an MDI child form, the value is applied to the MDI frame form, because the MDI child form does not have an icon on the task bar.
Before the form is shown (for example, in the load method), the value is applied when the form is shown. because there is no task bar icon before the form is made visible.
This functionality is available only if the application displays an icon on the Windows taskbar. It does not apply to icons in the system tray.
The method call can silently fail for some earlier versions of Windows (for example, Windows 8.0), even though the Microsoft documentation states that the functionality is available from Windows 7 and later.
The state parameter of this method can contain one of the Form class constants listed in the following table.
| Form Class Constant | Value | Description |
|---|---|---|
| TaskBar_State_NoProgress | 0 | Hides the progress state on the icon |
| TaskBar_State_Indeterminate | 1 | Causes a continuous icon progress state, drawing the state in green from 0 through 100 percent, repeated, indicating the action is in progress but the progress completion time is unknown |
| TaskBar_State_Normal | 2 | Displays the current progress state in green |
| TaskBar_State_Error | 4 | Sets the progress state to be drawn in red to indicate an error state |
| TaskBar_State_Paused | 8 | Displays the current progress state in yellow, to indicate that the action has been paused |
Any other value passed to the setTaskBarState method is treated as TaskBar_State_Normal (2).