dev_error_vardev_error_vardev_error_varDevErrorVarDevErrorVar (Operator)

Name

dev_error_vardev_error_vardev_error_varDevErrorVarDevErrorVar — Define or undefine an error variable.

dev_error_vardev_error_vardev_error_varDevErrorVarDevErrorVar defines an error variable, i.e., a variable which contains the result state of the last operator call. ErrorVarErrorVarErrorVarErrorVarerrorVar will be 2 (H_MSG_TRUE) if no error had occurred. The parameter ModeModeModeModemode specifies whether the error variable should be used (1) or not (0). If an error variable is active it will be updated each time an operator execution is finished. Thus a value is only valid until the next call of an operator. The value can be saved by assigning it to another variable (see example) or by calling dev_error_var(ErrorVar,0)dev_error_var(ErrorVar,0)dev_error_var(ErrorVar,0)DevErrorVar(ErrorVar,0)DevErrorVar(ErrorVar,0).

Parameters

ErrorVarErrorVarErrorVarErrorVarerrorVar (input_control) integer → (integer)

Name of the variable which shall contain the error status.

Default value: 'ErrorVar' "ErrorVar" "ErrorVar" "ErrorVar" "ErrorVar"

ModeModeModeModemode (input_control) integer → (integer)

Switch the error variable on or off.

Default value: 1

List of values: 0, 1

Example (HDevelop)

dev_close_window ()
dev_open_window (0, 0, 512, 512, 'black', WindowHandle)
dev_error_var (Error, 1)
dev_set_check ('~give_error')
FileName := 'wrong_name'
read_image (Image, FileName)
ReadError := Error
if (ReadError # H_MSG_TRUE)
  write_string (WindowHandle, 'wrong file name: '+FileName)
endif

dev_error_vardev_error_vardev_error_varDevErrorVarDevErrorVar (Operator)

Name

Signature

Description

Parameters

Example (HDevelop)

Result

Possible Predecessors

Possible Successors

See also

Module