macro keypad

In_of macro definition, contain_of macro Container_of is a common macro in Linux kernel. It is used to obtain the pointer of the structure from the pointer contained in a structure, generally, the first address of a member in the struct variable is obtained to obtain the first address of the entire struct variable. Implementation Method: Container_of (ptr, type,

Let macro of Common LISP is defined as follows: (Defmacro our-left (binds Body) '(lambda, (mapcar #' (lambda (x) (if (consp X) (Car X )) binds), @ body), @ (mapcar # '(lambda (x) (if (consp X) (cadr x) Nil )) binds); (Our-left (x 1) (Y 2) (+ x y) after expansion, it becomes => (lambda (x y) (+ x y) 1 2) here we can easily see that let is actually a Lambda syntactic sugar :) The let macro of scheme

The Meaning of # # # in C++/C macro definition (define)# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # define.#是字符串化的意思, the # that appears in the macro definition is a string that is followed by a parameter;eg#define STRCPY__ (DST, SRC) strcpy (DST, #src)Strcpy__ (BUFF,ABC) equivalent to strcpy__ (buff, "abc")# #是连接符号, connect the parameters together#define FUN (ARG) my# #argThen Fu

Usage and explanation of CONTAINING_RECORD macro in C ++ Windows, and containing_record macro Containing record is a very useful technique in C ++ programming, its function is to obtain the base address of a known struct or class, the address of the member in the object, and the struct name or class name. Because it is easy to write, it is used as a macro. #

In this instance, you will create a macro group that will contain the criteria to verify the password, and if the password is correct, close the Identity Check window first, and then open another form; If the password is incorrect, the message box will require the password to be entered again. Create a form, add a text box, and name it "Admin password" to receive the password that the user entered. Then create a OK button and a Cancel button.

　　 Turn the lens upside down. You can buy a reverse link (reverse ring adapter), turn the lens upside down and plug in the camera. Generally speaking, we will use standard mirror as the benchmark, because usually in 50mm standard lens, out of the magnification will be 1:1, and shorter focal length of the lens (such as 35mm/28mm, etc.) will have greater magnification. But this kind of shooting way has the same bad place, is because the lens design reverses the relation, therefore the ed

In this instance, a macro group containing conditions is created to verify the password. If the password is correct, close the identity check window and open another form; if the password is incorrect, a message box is displayed asking you to enter the password again. Create a form and add a text box named "administrator password" to receive the password entered by the user. Recreate In this instance, a macro