Win32 COM Error – DRAGDROP_E_NOTREGISTERED 0x80040100
In this post, you’ll learn more about the Error DRAGDROP_E_NOTREGISTERED
0x80040100 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
DRAGDROP_E_NOTREGISTERED
0x80040100
Win32 COM Error Error Description
Trying to revoke a drop target that has not been registered
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