How can I make a separate folder for my applicatio

问题:

I have successfully divided a large MFC project into a couple of smaller DLL projects. Now I want to have a separate folder called "DLL" in my application's folder, where all the all the DLLs from the subprojects are placed.

Can anybody give me guidance in how to achieve this?

回答1:

If you use LoadLibrary, you simply have to explicitly specify the full path of the DLLs you load.

If the DLLs are implicitly linked, you can do this in two ways.

• Have the installer modify the PATH variable. This is intrusive and "bad form"
• Write a "loader" application that locally modifies the path variable, then executes the real executable.

The best solution would be to simply put the DLLs in the same directory as the executable.

回答2:

DLL redirection is a fairly new feature (Windows 2000 IIRC). Name your DLL directory <myapp>.exe.local, and Windows will check it first for anything loaded via LoadLibrary(Ex). This includes delay-loaded DLLs.

回答3:

EDIT: As pointed out by Eric this doesn't work. Sorry.

See Dynamic-Link Library Search Order. In short you can do so using registry keys under the "HKEY_LOCAL_MACHINE\SORTWARE\Microsoft\Windows\CurrentVersion\App Paths" key. A reg file like the following shows how:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\MyApp.exe]
@="C:\\Program Files\\MyCompany\\MyApp\\MyApp.exe"
"Path"="C:\\Program Files\\MyCompany\\MyApp\\MyDLLs"