Is there any Delphi unit available corresponding msctf.h header file from Platform SDK?
I have checked Delphi 2010 source folder, but it seems Delphi doesn't come with that.
Thanks in advance for your time!
You can use Visual Studio's MIDL to generate a type library (.tlb) from the .idl file and then use Delphi's tlibimp.exe to generate the Delphi interface unit.
The problem with the original .idl is that it doesn't contain a library statement so I added it manually (otherwise MIDL wouldn't generate the .tlb).
See if the result helps you (you may still need to fix some parts by hand).