ofThread install instructions Step 0) Copy ofThread.h and ofThread.cpp to libs/openFrameworks/utils Step 1) Duplicate a project and rename it threadExample and replace testApp.h testApp.cpp and main.cpp with the thread demo files. Step 2) in ofMain.h add underneath the line "#include ofUtils.h" #include "ofThread.h" Step 3) in of Constants.h change the line // then the the platform specific includes: #ifdef TARGET_WIN32 To: // then the the platform specific includes: #ifdef TARGET_WIN32 //this is for TryEnterCriticalSection //http://www.zeroc.com/forums/help-center/351-ice-1-2-tryentercriticalsection-problem.html #ifndef _WIN32_WINNT # define _WIN32_WINNT 0x400 #endif Step 4) To run the demo app make sure in ofConstants.h you have using namespace std; #include #include //for ostringsream #include //for setprecision Step 5) Also to run the demo make sure you have in ofUtils.cpp //-------------------------------------------------- string ofToString(double value, int precision){ stringstream sstr; sstr << fixed << setprecision(precision) << value; return sstr.str(); } //-------------------------------------------------- string ofToString(int value){ stringstream sstr; sstr << value; return sstr.str(); } And also in in ofUtils.h: string ofToString(double value, int precision = 7); string ofToString(int value); Step 6) Add ofSleepMillis() add the line bellow to ofAppRunner.h: void ofSleepMillis(int millis); and add the code bellow to ofAppRunner.cpp //-------------------------------------- void ofSleepMillis(int millis){ #ifdef TARGET_WIN32 Sleep(millis); //windows sleep in milliseconds #else usleep(millis * 1000); //mac sleep in microseconds - cooler :) #endif }