No AppInit_DLL key in the registry on my XP SP3 box?

[D.J.Peters]

Do you have the AppInit_DLL key in your registry ?

Joshy

To create a class that can be used in every process, create the window class in a .dll and load the .dll in every process. To load the .dll in every process, add its name to the AppInit_DLLs value in following registry key:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Windows

Whenever a process starts, the system loads the specified .dll in the context of the newly started process before calling its entry-point function. The .dll must register the class during its initialization procedure and must specify the CS_GLOBALCLASS style.

[MichaelW]

For my Windows 2000 SP4 system and my Windows XP SP3 system an AppInit_DLLs key is present, but there is no value assigned to it.

[SARG]

Under W7 also empty

[D.J.Peters]

If no global process wide control classes are registered may be it isn't needed at all.

First i was thinking the class style CS_GLOBALCLASS is a key feature but looks like i'm misunderstood it.

thank you

Joshy

[St_W]

Using the (deprecated!) AppInit_DLL Registry-Key you can inject a DLL in every process that gets loaded.

CS_GLOBALCLASS is something rather different: you specify this wndclass-attribute, if you want your wndcls to be application (process) global.

Of course you can combine both features to register a WndCls in every process getting loaded.