View Compilation Error

125199_0_25996.cpp:4:20: windows.h: No such file or directory
125199_0_25996.cpp: In function `int main()':
125199_0_25996.cpp:13: error: `DWORD' undeclared (first use this function)
125199_0_25996.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
125199_0_25996.cpp:13: error: expected `;' before "t1"