WinAPI with Qt

RomanShteff

How can I use WinAPI library (.dll) in my Qt application? Is it possible?

dangelog

Yes, just use it.

RomanShteff

Should I declare DLL in my source file? That's it?

Alegen

what ide are you using?

if visual studio, then #include <windows.h>

please give more details :)

RomanShteff

I use Qt Creator and make Qt application. How can I connect DLL to my Qt project?

goetz

[quote author="RomanShteff" date="1296690300"]I use Qt Creator and make Qt application. How can I connect DLL to my Qt project?[/quote]

See "Declaring Other Libraries":http://doc.qt.nokia.com/4.7/qmake-project-files.html#declaring-other-libraries in the "qmake manual":http://doc.qt.nokia.com/4.7/qmake-manual.html

RomanShteff

Thanks for link to "Declaring Other Libraries". For example if I have my project in directory
"C:\Project", and my library is "mylib.dll" I should write in .pro-file:

@
LIBS += C:\Project\mylib.dll
@

Is it correct?

[EDIT: code formatting, Volker]

giesbert

no, wrong

you write:

for MSVC tool chain
@
LIBS += C:\Project\mylib.lib
@

for gcc tool chain:
@
LIBS += $$quote(-LC:\Project) -lmylib
@

minimoog77

Or better

@win32:LIBS += C:\Project\mylib.lib@

@unix:LIBS += $$quote(-LC:\Project) -lmylib@

giesbert

but if you use gcc on windows, it will have problems with mylib.lib

minimoog77

LOL, I usually forget that there is GCC for Windows... :)

RomanShteff

I use Qt Creator.

goetz

[quote author="RomanShteff" date="1296749017"]I use Qt Creator.[/quote]

That's the IDE, not the compiler tool chain. You can use both (VisualStudio or GCC/MinGW) with Qt Creator and your .pro file must be set up correctly for the one you use.

The default open source installation of Qt Creator/SDK for Windows comes with MinGW as far as I know.

RomanShteff

Yeah, I have default open source installation. But I have .dll, not .lib

giesbert

and you then have .a files. and for gcc, you use:

@
LIBS += -L<path to dlls> -l<dll name without extension>
@

RomanShteff

Thanks to all!