如何设置richedit可编辑区域

怎么设置richedit可编辑区域?
比如richedit的宽度是600,但只有0-300是可以输入内容的,到300后换行.

[解决办法]

C/C++ code

void __fastcall TForm1::Button1Click(TObject *Sender){    RECT rect;    SendMessage(RichEdit1->Handle, EM_GETRECT, 0, LPARAM(&rect));    rect.top = 4;    rect.left = 4;    rect.right = 300;    rect.bottom = RichEdit1->Height;    SendMessage(RichEdit1->Handle, EM_SETRECT, 0, LPARAM(&rect));    RichEdit1->Refresh();