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$comcall Identifier - mIRC
< mirc‎ | identifiers

$comcall calls a member of an open COM connection with the specified method and parameter, it is multithreaded and won't halt the script, an alias is called once the call returns.

If $comcall() fails when calling an object and $com() does not, this means that the object is not compatible with the threading model of mIRC, so $com() must be used. You can check the $comerr value in the alias to determine if a $comcall() failed or not.




  • name - The name of the connection or the Nth connection
  • alias - The name of an alias that will be called once the call returns
  • member - The name of the function of the object
  • method - A combination of the following value added together:
Value Method
1 DISPATCH_METHOD - Call a member of an object
3 (1+2) Call a member and return a value *
5 (1+4) Set a property with a member call *
6 (2+4) Set a property and return a value *
7 (1+2+4) Set a property and return a value with a member call *
8 DISPATCH_PROPERTYPUTREF - Set a property by reference
9 (1+8) Set a property by reference with a member call *
10 (2+8) Set a property by reference and return a value *
  • type1 - The variable type, can be:
Type Description Values
i1 single byte signed integer -128 to 127
ui1 single byte unsigned integer 0 to 255
i2 two byte signed integer -32768 to 32767
ui2 two byte unsigned integer 0 to 65535
i4 four byte signed integer +/- 2147483647
ui4 Holds unsigned 32-bit (4-byte) integers 0 through 4,294,967,295
int integer -2147483648 to 2147483647
uint unsigned integer 0 to 4294967295
r4 real, 4-byte floating point number 1.17549435E-38 to 3.40282347E+38
r8 double real, 8-byte floating point number 2.2250738585072014E-308 - 1.7976931348623157E+308
cy eight byte curreny number -922337203685477.5625 to 922337203685477.5625
date contains date and time, stored as an 8-byte floating-point number +/-79,228,162,514,264,337,593,543,950,335
decimal Holds signed 128-bit (16-byte) values representing 96-bit (12-byte) integer numbers. +/-79,228,162,514,264,337,593,543,950,335
bool contain any string or numeric representation.
bstr null-terminated unicode character string value. A string can contain from 0 to approximately 2 billion (2^31) Unicode characters.
variant can contain string, date, time, boolean, or numeric values. When used, a data type must follow it: for example: variant int 5
dispatch This data type indicates a pointer to an IDispatch interface on an OLE object (DBTYPE_IDISPATCH).
unknown This data type indicates a pointer to an IUnknown interface on an OLE object (DBTYPE_IUNKNOWN).
error This data type indicates a 32-bit error code (DBTYPE_ERROR)

You can pass a binary variable by prefixing the type of the variable with an '&' sign eg. $com(name,member,method,&bstr &binvar)

To make a variable by reference, postfix the data type with an asterisk and a variable name, for example: int* pIntOfBeer.

  • value1 - the value assigned to the variable type




alias runVbs {
  var %s = $mircdir $+ foo.vbs
  write -c foo.vbs  Dim c $lf c = 0 $lf Do While c < 10000000 $lf c = c + 1 $lf Loop
  .comopen x WScript.Shell
  ;mode 1 = comcall
  if ($1 == 1) noop $comcall(x, cbthread, Run, 1, bstr*, %s, int, 1, bool, 1)
  else {
    noop $com(x,  Run, 1, bstr*, %s, int, 1, bool, 1)
    .comclose x
alias cbthread echo -a done | .comclose x
Compare //var %t $ticks | runvbs 1 | echo -a $calc($ticks - %t) vs //var %t $ticks | runvbs 2 | echo -a $calc($ticks - %t)


Added: mIRC v5.9
Added on: 26 Apr 2001
Note: Unless otherwise stated, this was the date of original functionality.
Further enhancements may have been made in later versions.

See Also[edit]