Application Plugins

[GrahamL]

Hi
I am developing a set of plugins for my Qt application using VS 2012
When I created the project I selected Qt Library as the project type, but when I load the library with QPluginLoader the 'instance' method failed.
I then created another VS project using the 'Qt Application' as the project type and deleted main.cpp and using the VS properties manager I set the configuration type to Dynamic library, Using this method the plugin is loaded and behaves as expected.
I have compared the VS configuration properties and they are identical.
I have created a .pro file for both projects using VS and they are also identical.

I would be grateful if anyone could tell me the reason for this

Thanks

[andreyc]

When you the plugin do you get shared library?
Could you show part of .pro files with QT, CONFIG, TEMPLATE, and TARGET variables.

When I created a plugin using qtcreator I've got .pro file
@
...
QT += widgets network
QT -= gui

CONFIG += plugin debug

TARGET = $$qtLibraryTarget(my_plugin)
TEMPLATE = lib
...
@

[GrahamL]

Hi
This is the .pro file for plugin created in VS as a Qt Library
@

----------------------------------------------------

This file is generated by the Qt Visual Studio Add-in.

------------------------------------------------------

TEMPLATE = lib
TARGET = DockedWidget1Plugin
DESTDIR = ../plugins
QT += core widgets gui
CONFIG += debug console
DEFINES += WIN64 QT_DLL QT_WIDGETS_LIB DOCKEDWIDGET1PLUGIN_LIB
INCLUDEPATH += ../../DockedWidgets
../../../../../Acq++/CommonUI/ApplicationCode/Plugins
../../../../../Acq++/CommonQt/ApplicationCode/SystemLogging
../../../../../Acq++/Global
../../../../../Acq++/CommonUI/ApplicationCode/Preferences
../../../InterfaceFactoriesApplication/InterfaceFactoriesApplication
./Build/ui
.
./Build/moc
LIBS += -L"../../DockedWidgets/Build/Debug"
-L"../../../../../Acq++/bin"
-lDockedWidgetsd
-lCommonQtd
-lASLCommonUId
DEPENDPATH += .
MOC_DIR += ./Build/moc
OBJECTS_DIR += debug
UI_DIR += ./Build/ui
RCC_DIR += ./Build/rcc
HEADERS += ./DockedWidget1Plugin.h
./DockedWidget1PluginFactory.h
SOURCES += ./DockedWidget1Plugin.cpp
./DockedWidget1PluginFactory.cpp
@

and this is the .pro file produced for VS when the project was created as a Qt Application
@

----------------------------------------------------

This file is generated by the Qt Visual Studio Add-in.

------------------------------------------------------

TEMPLATE = lib
TARGET = DockedWidget2Plugin
DESTDIR = ../plugins
QT += core widgets gui
CONFIG += debug
DEFINES += WIN64 QT_DLL QT_WIDGETS_LIB
INCLUDEPATH += ../../../../../Acq++/CommonUI/ApplicationCode/Plugins
../../../../../Acq++/CommonQt/ApplicationCode/SystemLogging
../../../../../Acq++/Global
../../../../../Acq++/CommonUI/ApplicationCode/Preferences
../../../InterfaceFactoriesApplication/InterfaceFactoriesApplication
./Build/ui
.
./Build/moc
LIBS += -L"../../../../../Acq++/bin"
-lCommonQtd
-lASLCommonUId
DEPENDPATH += .
MOC_DIR += ./Build/moc
OBJECTS_DIR += debug
UI_DIR += ./Build/ui
RCC_DIR += ./Build/rcc
HEADERS += ./DockedWidget2Plugin.h
./DockedWidget2PluginFactory.h
SOURCES += ./DockedWidget2Plugin.cpp
./DockedWidget2PluginFactory.cpp
@