Linker error on using "CreateCompa...

[Dmitry Titov]

I have created the project. The project type is "Win32 DLL". There is the
following string in my project:
HDC hCDC = CreateCompatibleDC(hdc);
I see following error after compiling:
undefined reference to `CreateCompatibleDC@4'
But if i will create the project with type "Win32 GUI" and put this string
into it it will compiles without any errors. Why?

How can I compile my project with type "Win32 DLL"?

[Dmitry Titov]

I am sorry if I have put my question to the wrong section.

[Edmund Tudor]

You need to link to gdi32.lib
I believe this gets linked automatically when you choose Win32 GUI project,
but not for Win32 DLL.

[Dmitry Titov]

How I can see, what files get linked automatically to a project?

[Edmund Tudor]

I don't know if "linked automatically" is the best way to put that. Maybe
someone else here knows exactly how that works, I just seem to remember seeing
somewhere long ago that GUI projects add some libraries without you having to
explicitly link them.

[Dmitry Titov]

The function declaration “CreateCompatibleDC” is in a file “wingdi.h”. This
file is connected to the project as follows: “Tools-> CompilerOption->
Directories-> CInclude” the path “C:\Dev-Cpp\include \is specified”. Here
there is a file “wingdi.h”. The function description “CreateCompatibleDC” in
library “libgdi32.a”. This library is to the address “C:\Dev-Cpp\lib \”. It is
the address it is specified in compiler customisations: “Tools->
CompilerOption-> Directories-> Libraries”.
Specified above customisation are identical to both projects, but for the type
project “WIN32 DLL” the compiler produces an error. For the type project
“WIN32 GUI” compilation passes successfully.
In a directory with the type project “WIN32 DLL” I have copied a file
“libgdi32.a”. Also has made following customisations: “Project->
ProjectOptions-> Parameters-> Linker” has entered a filename “libgdi32.a”.
Compilation has passed successfully.
Why? After all the file “libgdi32.a” should be connected to the project
without additional customisations?