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Application.OnComponentEnterState Method (Visio)

Informs a Microsoft Visio instance that client code is causing the instance to enter or exit a particular state.

Version Added: Visio 2002

expression .OnComponentEnterState(uStateID, bEnter)

expression A variable that represents an Application object.

Parameters

Name

Required/Optional

Data Type

Description

uStateID

Required

VisOnComponentEnterCodes

Describes the state being entered or exited along with flags that influence behavior while in the indicated state.

bEnter

Required

Boolean

True to indicate that a state is being entered; False to indicate that a state is being exited.

Return Value

Nothing

The uStateIDargument indicates the state being entered or exited. Code that calls this method should do so both when entering and exiting the state.

At present, the only state change supported by the OnComponentEnterState method is visComponentStateModal, indicating that the client is performing an action that causes Visio to enter or exit a modal state.

Most client code doesn't need to call the OnComponentEnterState method when causing Visio to enter or leave the state of being modal, for example, when showing modal dialog boxes. Typically, this method is used by client code that shows dialog boxes other than Microsoft Visual Basic for Applications (VBA) forms and requires behavior different from the Visio default behavior.

Following are constants and values for uStateID, which are declared by the Visio type library in VisOnComponentEnterCodes. Any of the following constants prefixed with visModal can be combined with visComponentStateModal to influence Visio behavior when transitioning to or from a modal state.

Constant

Value

Description

visComponentStateModal

1

The state being identified is a modal state.

visModalDeferEvents

&H10000

Causes Visio to attempt to defer firing events while modal. By default, Visio defers firing events when displaying its own dialog boxes, but does not defer firing events when client code has caused a dialog box to appear.In the case of several nested modal scopes, if any scope is deferring events, all scopes within the outermost scope that is deferring events will defer events.This flag only has an effect when Visio is entering a modal scope. When exiting a modal scope, Visio behaves as it did when entering the scope.

visModalNoBeforeAfter

&H20000

Prevents Visio from firing a BeforeModal event when entering a modal scope or an AfterModal event when leaving a modal scope.By default, Visio fires these events when displaying its own dialog boxes or displaying dialog boxes implemented by VBA, but does not fire these events when client code displays a dialog box.Calling the OnComponentEnterState method will cause these events to fire unless visModalNoBeforeAfter is specified.

visModalDontBlockMessages

&H40000

Prevents Visio from rejecting calls from outside its main thread while modal. By default, Visio does reject calls from outside its thread while modal.In the case of several nested modal scopes, if any scope is deferring events, all scopes within the outermost scope that is deferring events will defer events.This flag only has an effect when Visio is entering a modal scope. When exiting a modal scope, Visio behaves as it did when entering the scope.

visModalDisableVisiosFrame

&H80000

Causes Visio to disable its frame window while modal. By default, Visio disables its frame window when showing its own dialog boxes or when showing dialog boxes implemented by VBA, but not when client code in another process shows a dialog box.If code in another process wants to show a dialog box and have the Visio frame window behave as if it is the Visio process showing the dialog box, it can set this flag.This flag only has an effect when Visio entering a modal scope. When exiting a modal scope, Visio behaves as it did when entering the scope.

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