MQL4参考标准常量，列举和架构命名常量 检测对象指针

Checking Object Pointer

The CheckPointer() function is used for checking the type of the object pointer. The function returns a value of the ENUM_POINTER_TYPE enumeration. If an incorrect pointer is used, the program execution will be immediately terminated.

Objects created by the new() operator are of POINTER_DYNAMIC type. The delete() operator can and should be used only for such pointers.

All other pointers are of POINTER_AUTOMATIC type, which means that this object has been created automatically by the mql4 program environment. Such objects are deleted automatically after being used.

ENUM_POINTER_TYPE

Constant	Description
POINTER_INVALID	Incorrect pointer
POINTER_DYNAMIC	Pointer of the object created by the new() operator
POINTER_AUTOMATIC	Pointer of any objects created automatically (not using new())