DLL static call and dynamic call

There are two methods to call a DLL: static call and dynamic call.

(1) The static call procedure is as follows:

1. Copy your youapp. DLL to the DEBUG directory of your target project (the project of youapp. DLL needs to be called;

2. Copy your youapp. lib to the directory of your target project (the project of youapp. DLL needs to be called;

3. Copy your youapp. H (including the definition of the output function) to your target project (you need to call the project of youapp. dll ).

Directory;

4. Open the selected project of your target project and select the settings menu of the Project Main Menu of Visual C ++;

5. After step 4 is executed, VC will pop up a dialog box, and select the link page in the Multi-page display control of the dialog box. However

Enter youapp. Lib in the object/library modules input box.

6. Select your target project head files and add: youapp. h file;

7. At last, include your: # include "youapp. H" in your target project (*. cpp, you need to call the function in DLL"

Note: youapp is the project name of your DLL.

2. Call it dynamicallyProgramAs follows:

For dynamic calls, you only need to perform static call step 1.

{

Hinstance hdllinst = loadlibrary ("youapp. dll ");

If (hdllinst)

{

Typedef DWORD (winapi * myfunc) (DWORD, DWORD );

Myfunc youfuntionnamealias = NULL; // youfuntionnamealias function alias

Youfuntionnamealias = (myfunc) getprocaddress

(Hdllinst, "youfuntionname ");

// The Name Of The function declared by youfuntionname in DLL

If (youfuntionnamealias)

{

Youfuntionnamealias (param1, param2 );

}

Freelibrary (hdllinst );

}

}

Explicit (static) call:

Lib + dll +. H. Note that the dllexport in. H is changed to dllimport.

Implicit (dynamic) call:

Dll + function prototype declaration, loadlibrary first, and then getprocaddress (that is, find the address of the function in DLL), without freelibrary