View Compilation Error

677532_0_0_26804.cpp:4:21: windows.h: No such file or directory
677532_0_0_26804.cpp: In function `int main()':
677532_0_0_26804.cpp:173: error: `Sleep' undeclared (first use this function)
677532_0_0_26804.cpp:173: error: (Each undeclared identifier is reported only once for each function it appears in.)