warning.h

用于查询PC机上的USB端口是否有设备挂接上

#pragma warning(3:4092)   // sizeof returns 'unsigned long'
#pragma warning(3:4121)   // structure is sensitive to alignment
#pragma warning(3:4125)   // decimal digit in octal sequence
#pragma warning(3:4130)   // logical operation on address of string constant
#pragma warning(3:4132)   // const object should be initialized
#pragma warning(4:4206)   // Source File is empty
#pragma warning(4:4101)   // Unreferenced local variable
#pragma warning(4:4208)   // delete[exp] - exp evaluated but ignored
#pragma warning(3:4212)   // function declaration used ellipsis
#pragma warning(error:4700)    // Local used w/o being initialized
#pragma warning(error:4259)    // pure virtual function was not defined
#pragma warning(4:4509)   // use of SEH with destructor
#pragma warning(4:4177)   // pragma data_seg s/b at global scope

#if 0
#pragma warning(3:4100)   // Unreferenced formal parameter
#pragma warning(3:4701)   // local may be used w/o init
#pragma warning(3:4702)   // Unreachable code
#pragma warning(3:4705)   // Statement has no effect
#pragma warning(3:4706)   // assignment w/i conditional expression
#pragma warning(3:4709)   // command operator w/o index expression
#endif