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Asked: 2026-05-19T09:13:39+00:00

I have a personal project I’m working on that requires Microsoft SAPI5 — text

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I have a personal project I’m working on that requires Microsoft SAPI5 — text to speech and Speech Recognition. I have already built out a lot of the application, but I’ve decided to switch and try to learn the Qt Framework, as it will make a lot of things much simpler.

The project won’t build as it can’t find the header files from the Windows SDK. I can’t figure out where I went wrong.

I’ve done my best to edit my .pro file. In addition to what’s below, I also tried a version where I explicitly listed the header files, but it still couldn’t find the file.

Error: sapi.h: No such file or directory

Includes in speech.h:

#include <QObject>
#include <sapi.h>

My .pro file:

QT       += core gui

TARGET = QT_River
TEMPLATE = app

INCLUDEPATH += "C:\Projects\custom libraries\include" \
    "C:\Program Files\Microsoft SDKs\Windows\v7.1\Include";

win32:LIBS += "C:\Projects\custom libraries\lib_dbg" \
    "C:\Program Files\Microsoft SDKs\Windows\v7.1\Lib";

SOURCES += main.cpp \
    window.cpp \
    speech.cpp

HEADERS  += window.h \
    speech.h

FORMS    +=

RESOURCES += \
    systray.qrc

P.S. I’d like to keep it cross platform compatible, but can find no Qt libraries for doing dictation based Speech Recognition and text-to-speech. If anyone knows of one, please let me know.

P.S.S. I’ve been searching for this answer for about two hours on the internet, including a thorough search of this website. I found nothing that helped.

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1 Answer

  1. Editorial Team

    After many hours this morning, I’ve managed to resolve my problem.

    Rather than using Qt Creator, I’ve decided to use Visual Studio 2010 + Qt 4.7.1. I’ve managed to implement this solution successfully, and have my project off the ground and running now.

    I recommend this approach for anyone trying to use the Windows SDK + Qt.

    This is the resource that helped me (all the information you need is in the question):

    Compiling Qt – Visual Studio 2010

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