View Compilation Error

0_0_6393477_17438.cpp:4:20: windows.h: No such file or directory
0_0_6393477_17438.cpp: In function `int main()':
0_0_6393477_17438.cpp:32: error: `Sleep' undeclared (first use this function)
0_0_6393477_17438.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)