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hong  
#1 Posted : Monday, December 7, 2009 10:50:25 AM(UTC)
hong

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Groups: AcademicCoachingSchool, admin, Administration, BookSeller, CatholicSchool, CoachingAdult, CoachingProfessional, CoachingSports, ExtraCurriculumCoaching, IndependentSchool, Moderator, MusicTeacher, PrivateSchool, PublicSchool, SelectiveSchool, tutor
Joined: 11/23/2008(UTC)
Posts: 522

You cannot call ShowModal once a window has had its visible state changed to true. Also the FormStyle of your form property cannot be FsMdiChild.

To fix the error,
1.set visible to false
2.replace formstyle FsMdiChild with FsNormal
3.enabled value of your form property is false.
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