|R0||Pointer to standard SWI Error Block|
|R2||Pointer to title text (if R1 bit 4 is set), or|
|Pointer to application name (if R1 bit 4 is not set), or|
|0 for basic error box title|
|R3||Sprite name (if bit 8 is set)|
|R4||Sprite Area (if bit 8 is set)|
|R5||Pointer to string containing list of user specific button names (comma delimited)|
|R1||0 = No selection|
|1 = OK|
|2 = Cancel|
|3 = Extra Button|
|4 = Extra Button|
|5 = Extra Button|
The purpose of this call is to display an error box to the user.
The use of this call should be avoided where possible, due to the non-multitasking nature of these error boxes.
Application specific buttons can be displayed in an error box, by having a list of button names, separated by commas in R5.
The total size for all the user specific button names is 256 characters.
No more than 8 buttons can be displayed in an error box.
A user pressing Return will have the same effect as clicking on the default button.
Pressing Escape is the same as choosing the default cancel option on the error box.
The SWI error block must be zero terminated.