问题的症结已经找到，原来是我那个窗体中的DataTimePicker控件在作怪，在构造过程中就死了
出现"Invalid pointer operation",看了看一段帮助：
Description
TDateTimePicker is a visual component designed specifically for entering dates or times.
In dmComboBox date mode, it resembles a list box or combo box, except that the drop-down
list is replaced with a calendar illustration; users can select a date from the calendar.
Dates or times can also be selected by scrolling with Up and Down arrows and by typing.
Date-time picker ignores the BiDiMode setting for right-to-left reading, displaying dates
according to the system locale.
TDateTimePicker formats date and time values according to the date and time settings in the
Regional Settings of the Control panel on the user's system. Because TDateTimePicker is a
wrapper for a Windows control, these formats can be changed by changing the formatting
variables in the SysUtils unit. However, you can use the Windows API call DateTime_SetFormat
to programmatically specify these settings.
Note: The underlying Windows control is known to behave unpredictably when used to set dates
in 1752, the year English-speaking countries changed to the Gregorian calendar. Similar problems
may appear for different dates when a non-English locale is used. If an application may be
used to specify dates on or before the changeover in the current locale (for example, 1918 or
before in Russian locales), be sure to test the application using the dates affected.
大意是说：其格式设置必须调用Windows API函数通过编程来实现,而在我的程序里是在属性面板上修改的，
所以发生错误的，我理解的不知对不对？
用记事本打开其Dfm文件将Format= *********那行删除后，程序能顺利运行，
不过，我该如何通过编程达到我的目的：使DataTimePicker的 Format = yyyy年MM月dd日，
DateTime_SetFormat这函数怎么用啊？
