我按照下面做了，问题解决啦！ Delphi 4.x - 7.x: --------------------Uninstall previous or evaluation version of EhLib (Old version) from Delphi IDE. Remove or copy to other directory files of old version to prevent crossing old and new version of EhLib (Including EhLib.bpl, EhLib.dcp or EhLibXX.bpl, EhLibXX.dcp files). Create directory from which you will install EhLib library ('EhLib directory') (for example, C:\Delphi[X]\EhLib).Copy files from Common and Delphi[X] directories of the EhLib archive to 'EhLib directory'.Use "File\Open..." menu item of Delphi IDE to open the runtime package - EhLibXX.Dpk. In "Package..." window click "Compile" button to compile the package.By default Delphi (5, 6 and 7) place compiled EhLibXX.BPL file to the <Delphi path>\Projects\Bpl directory and this directory already present in the search PATH. But if you overwrite default BPL directory then you need put compiled EhLibXX.BPL file into directory that is accessible through the search PATH (i.e. DOS "PATH" environment variable; for example, in the Windows\System directory).Add, (if needed) 'EhLib directory' in Tools->Environment Options->Library-> Library Path.After compiling run-time package you must install design-time package DclEhLibXX.BPL into the IDE.Use "File\Open..." menu item to open design-time package DclEhLibXX.Dpk. In "Package..." window click "Compile" button to compile the package and then click "Install" button to register EhLib components on the component palette. EhLib components have to appear on 'EhLib' page of components palette.
EhLib v3.0 Full Source在Delphi 7中的安装方法
1. 将EhLib v3.0 Full Source解压缩到目标目录。
2. 打开Delphi 7，将EhLib的\Delphi7子目录加到Delphi的Library path。
(菜单操作路径为：Tools|Environment Options...|Library|Library path)
3. 将EhLib目标安装目录中的common和DataService子目录的文件移动到EhLib的\Delphi7子目录中。
4. 在Delphi 7中打开EhLib70.dpk，编译，但不要安装。
5. 在Delphi 7中打开DclEhLib70.dpk，编译并安装。
6. 组件面板中出现一个EhLib的组件页。
7. 打开附带的DEMOS，编译并运行，测试安装成功。
Delphi 4.x - 7.x:
--------------------Uninstall previous or evaluation version of EhLib (Old version) from Delphi
IDE. Remove or copy to other directory files of old version to prevent
crossing old and new version of EhLib (Including EhLib.bpl, EhLib.dcp or
EhLibXX.bpl, EhLibXX.dcp files). Create directory from which you will install EhLib library
('EhLib directory') (for example, C:\Delphi[X]\EhLib).Copy files from Common and Delphi[X] directories of the EhLib archive
to 'EhLib directory'.Use "File\Open..." menu item of Delphi IDE to open the runtime package -
EhLibXX.Dpk.
In "Package..." window click "Compile" button to compile the package.By default Delphi (5, 6 and 7) place compiled EhLibXX.BPL file to the
<Delphi path>\Projects\Bpl directory and this directory already present
in the search PATH. But if you overwrite default BPL directory then you need
put compiled EhLibXX.BPL file into directory that is accessible
through the search PATH (i.e. DOS "PATH" environment variable; for example,
in the Windows\System directory).Add, (if needed) 'EhLib directory' in Tools->Environment Options->Library->
Library Path.After compiling run-time package you must install design-time
package DclEhLibXX.BPL into the IDE.Use "File\Open..." menu item to open design-time package DclEhLibXX.Dpk.
In "Package..." window click "Compile" button to compile the package
and then click "Install" button to register EhLib components on
the component palette. EhLib components have to appear on 'EhLib' page of components palette.