Search notes:

user32.dll

Multi-User Windows USER API Client DLL.

DLL_PROCESS_ATTACH

When user32.dll receives DLL_PROCESS_ATTACH notification, it loads (LoadLibrary()) the DLLs that are listed under the value AppInit_DLLs under the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows .

See also

comctl32.dll
EnumChildWindows, LockWorkStation, SendMessage
WinUser.h
The attribute user32 in the Python library ctypes.windll

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