I am considering porting applications that use Rich Edit controls from Windows to Mac OS X. Are Rich Edit text controls supported? Note 1: a rich edit control supports colour and font changes in the text. The Windows API has functions to change colour and font of currently selected text in the control. In theory this would allow a program to change text attributes dynamically on the fly, but see Note 2... Note 2: The API for rich edit controls worked fine for 2-3 page tiny texts. For larger texts, 50 or more pages, the screen was twitching and blinking and it took more than 30 seconds to show the first page. Other users have reported the same on various forums. My workround was not to use the API and putting raw rtf format text into the control starting from the top. If rich edit controls are supported do they have this problem too? If rich edit controls are not supported is there something equivalant?