Wincc中有两个内部函数可用来处理原始数据变量：GetTagRaw和SetTagRaw
BOOL GetTagRaw(Tag Tag_Name, BYTE* pValue, DWORD size);
Function：Determines the value of a tag of data type "Raw Data Type".
Parameter：
Tag_Name ：Name of the tag
pValue：The pointer to a byte field which contains the value of the raw data tag.
size：Size of the byte field in bytes.
Return value：
TRUE：The function has been completed without any errors.
FALSE：An error occurred.

Example of reading out a raw data type tag
{
#define DATA_SIZE 3
BYTE byData[DATA_SIZE];
//Get the current values of the tag
GetTagRaw("gs_tag_raw",byData,DATA_SIZE);
//Use the values received in the array byData
...
}
GetTagRaw function parameters:
"gs_tag_raw" is the name of the tag.
"byData" is the byte array in which the values in the raw data tag are stored.
"DATA_SIZE" is the number of values read.
1. Read out the tag values and buffer in byData.
2. Execution of user-defined codes for processing the return values.