src\PowderToySDL.cpp(616): error C2065: 'sdl_wminfo' : undeclared identifier

src\PowderToySDL.cpp(616): error C2228: left of '.version' must have class/struct/union

type is ''unknown-type''

src\PowderToySDL.cpp(616): error C2227: left of '->major' must point to class/struct/union/generic type

src\PowderToySDL.cpp(616): error C2065: 'sdl_wminfo' : undeclared identifier

src\PowderToySDL.cpp(616): error C2228: left of '.version' must have class/struct/union

type is ''unknown-type''

src\PowderToySDL.cpp(616): error C2227: left of '->minor' must point to class/struct/union/generic type

src\PowderToySDL.cpp(616): error C2065: 'sdl_wminfo' : undeclared identifier

src\PowderToySDL.cpp(616): error C2228: left of '.version' must have class/struct/union

type is ''unknown-type''

src\PowderToySDL.cpp(616): error C2227: left of '->patch' must point to class/struct/union/generic type

src\PowderToySDL.cpp(617): error C2065: 'sdl_wminfo' : undeclared identifier

src\PowderToySDL.cpp(618): error C2065: 'sdl_wminfo' : undeclared identifier

src\PowderToySDL.cpp(618): error C2228: left of '.info' must have class/struct/union

type is ''unknown-type''

src\PowderToySDL.cpp(618): error C2228: left of '.x11' must have class/struct/union

src\PowderToySDL.cpp(618): error C2228: left of '.lock_func' must have class/struct/union

src\PowderToySDL.cpp(619): error C2065: 'XA_CLIPBOARD' : undeclared identifier

src\PowderToySDL.cpp(619): error C2065: 'sdl_wminfo' : undeclared identifier

src\PowderToySDL.cpp(619): error C2228: left of '.info' must have class/struct/union

type is ''unknown-type''

src\PowderToySDL.cpp(619): error C2228: left of '.x11' must have class/struct/union

src\PowderToySDL.cpp(619): error C2228: left of '.display' must have class/struct/union

src\PowderToySDL.cpp(619): error C3861: 'XInternAtom': identifier not found

src\PowderToySDL.cpp(620): error C2065: 'XA_TARGETS' : undeclared identifier

src\PowderToySDL.cpp(620): error C2065: 'sdl_wminfo' : undeclared identifier

src\PowderToySDL.cpp(620): error C2228: left of '.info' must have class/struct/union

type is ''unknown-type''

src\PowderToySDL.cpp(620): error C2228: left of '.x11' must have class/struct/union

src\PowderToySDL.cpp(620): error C2228: left of '.display' must have class/struct/union

src\PowderToySDL.cpp(620): error C3861: 'XInternAtom': identifier not found

src\PowderToySDL.cpp(621): error C2065: 'sdl_wminfo' : undeclared identifier

src\PowderToySDL.cpp(621): error C2228: left of '.info' must have class/struct/union

type is ''unknown-type''

src\PowderToySDL.cpp(621): error C2228: left of '.x11' must have class/struct/union

src\PowderToySDL.cpp(621): error C2228: left of '.unlock_func' must have class/struct/union

i have followed the guide to the letter

 if you could help please do

thanks