以上各位说的都不错。我想补充说明获得IE路径的问题：
一般来说IE的路径放在注册表
HKEY_CLASSES_ROOT/htmlfile/shell/open/command键值下。
当你获得键值后可用ShellExecute函数启动，关于ShellExecute函数定义如下：
HINSTANCE ShellExecute(
HWND hwnd, // handle to parent window
LPCTSTR lpOperation, // pointer to string that specifies operation to perform
LPCTSTR lpFile, // pointer to filename or folder name string
LPCTSTR lpParameters, // pointer to string that specifies executable-file parameters
LPCTSTR lpDirectory, // pointer to string that specifies default directory
INT nShowCmd // whether file is shown when opened
);
Parameters
hwnd
Specifies a parent window.
This window receives any message boxes that an application produces.
For example, an application may report an error by producing a message box.
lpOperation
Pointer to a null-terminated string that specifies the operation to perform.
The following operation strings are valid:
String Meaning
"open" The function opens the file specified by lpFile.
The file can be an executable file or ado
cument file. The file can be a folder to open.
"print" The function prints the file specified by lpFile.
The file should be ado
cument file. If the file is an executable file, the function opens the file, as if "open" had been specified.
"explore" The function explores the folder specified by lpFile.
The lpOperation parameter can be NULL.
In that case, the function opens the file specified by lpFile.
lpFile
Pointer to a null-terminated string that specifies the file to open
or print or the folder to open or explore. The function can open an executable
file or ado
cument file. The function can print ado
cument file.
lpParameters
If lpFile specifies an executable file, lpParameters is a pointer to
a null-terminated string that specifies parameters to be passed to
the application.
If lpFile specifies ado
cument file, lpParameters should be NULL.
lpDirectory
Pointer to a null-terminated string that specifies the default directory.
nShowCmd
If lpFile specifies an executable file,
nShowCmd specifies how the application is to be shown when it is opened.
This parameter can be one of the following values:
Value Meaning
SW_HIDE Hides the window and activates another window.
SW_MAXIMIZE Maximizes the specified window.
SW_MINIMIZE Minimizes the specified window and activates the next top-level window in the Z order.
SW_RESTORE Activates and displays the window. If the window is minimized or maximized, Windows restores it to its original size and position. An application should specify this flag when restoring a minimized window.
SW_SHOW Activates the window and displays it in its current size and position.
SW_SHOWDEFAULT Sets the show state based on the SW_ flag specified in the STARTUPINFO structure passed to the CreateProcess function by the program that started the application. An application should call ShowWindow with this flag to set the initial show state of its main window.
SW_SHOWMAXIMIZED Activates the window and displays it as a maximized window.
SW_SHOWMINIMIZED Activates the window and displays it as a minimized window.
SW_SHOWMINNOACTIVE Displays the window as a minimized window. The active window remains active.
SW_SHOWNA Displays the window in its current state. The active window remains active.
SW_SHOWNOACTIVATE Displays a window in its most recent size and position. The active window remains active.
SW_SHOWNORMAL Activates and displays a window. If the window is minimized or maximized, Windows restores it to its original size and position. An application should specify this flag when displaying the window for the first time.
If lpFile specifies ado
cument file, nShowCmd should be zero.
