TextBox.MarkIncomplete

Read and write.Type: Boolean.
You can use this property to specify is a special mark should be currently displayed in the text box or not. If the property has True value, a special mark will be displayed irrespective of the data that are stored in text box; if the property has False value, a special mark will not be displayed irrespective of the data that are stored in text box .
When editing starts, the property value is reset, even if the AutoMarkIncomplete property has a value of False.
Thick client.

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