Simulates a drop-down operation on the combo box.

bool AIT_ComboBoxDropDown  (
  string strCaption       // Control's caption
  [,float fTimeOut]       // Time-out
); 
bool AIT_ComboBoxDropDown  (
  integer nCtrlID         // Control ID
  [,float fTimeOut]       // Time-out
); 

strCaption (input)

Specify the caption of a control.

nCtrlID (input)

Specify a control ID.

fTimeOut (input, optional)

Specify the maximum time the function can use to find the control, in units of seconds. The default is the value set in the AIT_SetDefaultWaitTimeout function.

The return value is true if the function was executed normally, and false if not.

If the function has returned false, you can use AIT_GetLastError to acquire an extended error code. The following gives the error codes that AIT_GetLastError may return.

Extended error number	Error code
8	ERROR_NOT_ENOUGH_MEMORY
14	ERROR_OUTOFMEMORY
87	ERROR_INVALID_PARAMETER
112	ERROR_DISK_FULL
1400	ERROR_INVALID_WINDOW_HANDLE
1460	ERROR_TIMEOUT

You can identify the control by using a complete caption or an associated label name or specifying the first part of such a caption or label name. When specifying the first part, prefix a swung dash (~) to the character string that you specify.