用EXPRESS EDITORS 中的dxedit的问题(20分)

用EXPRESS EDITORS 中的dxedit的问题
用如下语句:
MyData.SuppliersADOTable1.FieldByName(CompanyName).AsString := CompanyName.Text ;
出现这样的错误.
[Error] SuppliersAdd.pas(121): Incompatible types: 'String' and 'TdxEdit'
怎么解决.

是编译期错误，还是运行期错误？

编译错误,这样也出错.
MyData.SuppliersADOTable1.Open;
MyData.SuppliersADOTable1.Insert;
MyData.SuppliersADOTable1.FieldByName(SupplierID).AsInteger := 0078 ;
MyData.SuppliersADOTable1.FieldByName(CompanyName).AsString := 'aaaaaaa' ;
MyData.SuppliersADOTable1.Post;

[Error] SuppliersAdd.pas(121): Incompatible types: 'String' and 'TdxMaskEdit'
[Error] SuppliersAdd.pas(122): Incompatible types: 'String' and 'TdxEdit'

改过的代码
MyData.SuppliersADOTable1.Open;
MyData.SuppliersADOTable1.Insert;
MyData.SuppliersADOTable1.FieldByName('SupplierID').AsInteger := 0078 ;
MyData.SuppliersADOTable1.FieldByName('CompanyName').AsString := 'aaaaaaa' ;
MyData.SuppliersADOTable1.Post;
注FieldByName('CompanyName')括号中的就是一个字段名要用字符型，

接受答案了.