Table of Contents
Advertisement
PLANAR R54x2
10
COM Automation Data Types
In COM automation, there are the following data types, which can be used for client-to-
server communication:
Long
Double
Boolean
String
Variant
32-bit signed integer, value range from –2147483648 to 2147483647
64-bit
double-precision
–1.79769313486232E308 to –4.94065645841247E–324 for negative
values, and from 4.94065645841247E–324 to 1.79769313486232E308
for positive values
16-bit integer, two values 0 – False, 1 – True
Variable-length string
Can be either a value of arbitrary type or an array of values of arbitrary
type. In this case, the term "arbitrary type" means any allowed type of
COM automation. A variable contains information about its type and
array size (if it is an array). It is used for communication of data arrays
between a client and a server.
COM/DCOM Programming manual
floating
point,
value
range
from
16
Advertisement
Table of Contents
