在DBGRID上显示和添加进度条，本案例通过创建一个DBGRID的派生类来获取dbgrid1某一列的RECT值来完成进度条的添加和显示，并在DELPHI7和XP上编译通过。-DBGRID on display and add a progress bar RECT value of dbgrid1 a column in this case by creating a DBGRID derived class to get done to add and display of the progr