Quá trình này bao gồm vị trí một dịch vụ Web, cũng như thẩm vấn các tài liệu WSDL để xác định làm thế nào để tương tác với dịch vụ Web. Chương này xem xét các công cụ trong Microsoft NET Framework có thể được sử dụng để | character ASCII 3FH into every byte of the buffer. The DUP directive can also be used to store repeated patterns into larger variables and buffers. This can make the buffers and variables easy to spot when you perform a hex dump from DEBUG Marked DB 10 DUP Zorro Tablel DB 5 DUP 02H 08H DB 64 DUP STACK The last example allocates space for the stack segment in . Although this statement illustrates the fact that you don t have to name a buffer that simply exists to take up space as in allocating space for the stack segment I recommend that you name all variables and buffers. Setting Up the Code Segment Like any segment the code segment must have a name and the name must be given at the start and end of the segment definition before the SEGMENT and ENDS directives. Although the name is unimportant and probably won t be referenced anywhere in the code it must be there or you will receive an assembler error. An ASSUME directive must be included in the program. Its purpose is to tell the assembler which of the segments you have defined is to be used for the code segment and which segment is to be used for the data segment. Unlike the stack segment which has the directive STACK to tell the assembler what sort of segment it is nothing in the code or data segments specifies which sort of segment they are. It isn t enough that there are variables defined in the data segment or machine instructions in the code segment. The assembler will allow you put variable definitions in the code segment and machine instructions in the data segment regardless of whether that makes sense or not. It may in certain extremely advanced techniques. In the ASSUME directive tells the assembler that the code segment will be the segment named MyCode and that the data segment will be named MyData. has its machine instructions grouped together in a procedure named Main with the PROC directive. This is not strictly necessary unless you have broken down your program into .
