Microsoft Edge Try Microsoft Edge A fast and secure browser that's designed for Windows 10 Get started

This site uses cookies for analytics, personalized content and ads. By continuing to browse this site, you agree to this use. Learn more
Microsoft Microsoft
Windows Dev Center
    • .NET
      • Apps
      • Internet of Things
      • Mixed Reality
      • Microsoft Edge
      • Hardware
      • IT Center
      • What is Azure
      • Products
      • Solutions
      • Pricing
      • Create a free account
      • Visual Studio
      • Visual Studio IDE
      • Visual Studio Team Services
      • Visual Studio Code
      • Xamarin
      • Visual Studio Dev Essentials
      • Subscriptions
      • Office Dev Center
      • Office 365 for IT pros
    • Microsoft Graph
      • Store
      • Cortana
      • Bing
      • Application Insights
      • .NET
      • Microsoft Azure
      • Microsoft Graph
      • Visual Studio
      • Visual Studio Team Services
      • Windows
      • Office
      • All Developer Centers
    • TechNet
    • Microsoft Developer Network
      • Windows IT Center
      • Office 365 for IT Pros
      • All IT TechCenters
      • Microsoft Download Center
      • Microsoft Azure
      • Visual Studio
      • SDKs
      • Windows
      • Office
      • Microsoft Graph
      • MSDN
      • Azure
      • Windows
    • PowerShell scripts
      • Microsoft Azure
      • Visual Studio
      • Visual Studio Team Services
      • Developer tools
      • Office Dev Blog
      • Server & management
      • Windows
      • Developers
      • TechNet
      • Microsoft Tech Community
      • Visual Studio (MSDN) subscriptions
      • Microsoft Cloud Essentials
      • Microsoft Virtual Academy
      • IT Pro Career Center
    • Microsoft Evaluation Center
    • Channel 9
    • No results
    Sign in
    Windows Dev Center Dashboard
    Windows desktopGet startedDesignDevelopTest & deploy
    • API reference
    • Downloads
    • Samples
    • Support
    Dashboard
    Control Library Header Control Header Control Reference
    Header Control Reference Header Control Messages
    Header Control Messages
    Header Control Messages
    Header Control Macros
    Header Control Messages
    HDM_CLEARFILTER
    HDM_CREATEDRAGIMAGE
    HDM_DELETEITEM
    HDM_EDITFILTER
    HDM_GETBITMAPMARGIN
    HDM_GETFOCUSEDITEM
    HDM_GETIMAGELIST
    HDM_GETITEM
    HDM_GETITEMCOUNT
    HDM_GETITEMDROPDOWNRECT
    HDM_GETITEMRECT
    HDM_GETORDERARRAY
    HDM_GETOVERFLOWRECT
    HDM_GETUNICODEFORMAT
    HDM_HITTEST
    HDM_INSERTITEM
    HDM_LAYOUT
    HDM_ORDERTOINDEX
    HDM_SETBITMAPMARGIN
    HDM_SETFILTERCHANGETIMEOUT
    HDM_SETFOCUSEDITEM
    HDM_SETHOTDIVIDER
    HDM_SETIMAGELIST
    HDM_SETITEM
    HDM_SETORDERARRAY
    HDM_SETUNICODEFORMAT
    HDM_TRANSLATEACCELERATOR
    Header Control Notifications
    Header Control Structures
    Header Control Constants
    TOC
    Collapse the table of content
    Expand the table of content
    This documentation is archived and is not being maintained.
    This documentation is archived and is not being maintained.

    Header Control Messages

    In This Section

    • HDM_CLEARFILTER
    • HDM_CREATEDRAGIMAGE
    • HDM_DELETEITEM
    • HDM_EDITFILTER
    • HDM_GETBITMAPMARGIN
    • HDM_GETFOCUSEDITEM
    • HDM_GETIMAGELIST
    • HDM_GETITEM
    • HDM_GETITEMCOUNT
    • HDM_GETITEMDROPDOWNRECT
    • HDM_GETITEMRECT
    • HDM_GETORDERARRAY
    • HDM_GETOVERFLOWRECT
    • HDM_GETUNICODEFORMAT
    • HDM_HITTEST
    • HDM_INSERTITEM
    • HDM_LAYOUT
    • HDM_ORDERTOINDEX
    • HDM_SETBITMAPMARGIN
    • HDM_SETFILTERCHANGETIMEOUT
    • HDM_SETFOCUSEDITEM
    • HDM_SETHOTDIVIDER
    • HDM_SETIMAGELIST
    • HDM_SETITEM
    • HDM_SETORDERARRAY
    • HDM_SETUNICODEFORMAT
    • HDM_TRANSLATEACCELERATOR

     

     

    Show:
    Print Export (0)
    Print Share
    IN THIS ARTICLE
      Is this page helpful?
      Additional feedback?
      1500 characters remaining
      Thank you! We appreciate your feedback.
      What's new
      • New Surface Pro
      • Xbox One X
      • Xbox One S
      • Surface Laptop
      • Windows 10 apps
      • Office apps
      • Mixer
      Store & Support
      • Account profile
      • Download Center
      • Sales & support
      • Returns
      • Order tracking
      • Store locations
      • Support
      Education
      • Microsoft in education
      • Office for students
      • Office 365 for schools
      • Deals for students & educators
      • Microsoft Azure in education
      Enterprise
      • Microsoft Azure
      • Enterprise
      • Data platform
      • Find a solutions provider
      • Microsoft partner resources
      • Microsoft AppSource
      • Manufacturing & resources
      • Financial services
      Developer
      • Microsoft Visual Studio
      • Windows Dev Center
      • Microsoft Developer Network
      • TechNet
      • Microsoft Virtual Academy
      • Microsoft developer program
      • Channel 9
      • Office Dev Center
      Company
      • Careers
      • About Microsoft
      • Company news
      • Privacy at Microsoft
      • Investors
      • Diversity and inclusion
      • Accessibility
      • Security
      English (United States)
      • Sitemap
      • Contact us
      • Privacy & cookies
      • Terms of use
      • Trademarks
      • About our ads
      • © Microsoft 2017
      English
      Deutsch English Español Français
      Italiano 日本語 한국어 Português
      Pусский 简体中文 繁體中文
       
      © 2017 Microsoft