h6. [[WindowManager]] h6(. » [[WindowManager SWI Calls|SWI Calls]] h6((. » [[Wimp_CreateIcon]] h6(((. » [[Wimp_CreateIcon (window syntax)|Wimp_CreateIcon (window syntax)]] h6((((. » [[Icon Block|Icon Block]] h6(((((. » [[Icon Data|Icon Data]] h6((((((. » [[Validation Strings|Validation Strings]] h6(((((((. » Validation String U h2. Validation String U h4. Use Sets the maximum number of characters allowed in a writable icon. h4. Notes This is distinct from the maximum number of bytes allowed, specified in the [[Icon Block|icon block]], when the system alphabet is UTF8. Theoretically, 6 bytes per characters should be allowed, but in practice 4 is usually enough. h4. Syntax |<^. <code>U<n></code> | |<^. Where <code>n</code> is the maximum number of characters allowed. | h4. Examples |<^. <code>U16</code> |<^. | h4. See also * [[Validation Strings|Validation Strings]] * [[Wimp_CreateWindow|Wimp_CreateWindow]] * [[Wimp_CreateIcon|Wimp_CreateIcon]]