When I use MIDL to compile a IDL file to .h and .c, I get a error said:
midl : command line error MIDL1004 : cannot execute C preprocessor cl.exe.
Please kindly help me, I do not know why.
The MIDL compiler which I use is part of VC++ 6.0.
Thanks.
It seems your environment is not correctly set. Try calling
vcvars32
before compiling.