I want to change overlay Icon of file on the basis of some status. if file status get changed the overlay Icon should change. for example: If file is locked overlay icon related to locked should set & If release it should set different overlay icon.
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http://www.codeproject.com/Articles/7484/How-to-overlay-an-icon-over-existing-shell-objects – Jonathan Potter Jan 14 '15 at 20:37
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To set overlay Icon needs to implement a IShellIconOverlayIdentifier interface
write registry entries in registry for COM dll registration and one more registry requires for overlay icon identifier registration see below:
Key:"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers\TestShellIconOverlayIdentifiers"
with default value [CLSID_of_registered_DLL]
After this some functions need to call while registration to insert overlay Icons in system memory of already running instances of explorer for that I found the answer on below post. How can I programmatically refresh Windows Explorer?
See the function "bool RebuildIcons()" on TortoiseCVS - ShellUtils.cpp
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