golang syscall 3 summary of the loading DLL methods

1. ()

MustLoadDLL is a function that loads a DLL. It will panic directly if an error occurs when loading a DLL.

Error handling: If the DLL fails to load, it calls panic, causing the program to crash.

dll := ("")  // If loading fails, panic

MustLoadDLL attempts to load the specified DLL, which directly causes the program to crash if the DLL fails to load (for example, the DLL file does not exist or the path is wrong). Therefore, this function is usually used to load DLL files that must exist, and the program cannot tolerate DLL loading failures.

2. ()

NewLazyDLL is used to create a "lazy load" DLL object. This means that the DLL will be loaded, but the loading operation will only happen when you call the function inside it.

Lazy Loading: When you call NewLazyDLL to create a DLL object, it does not load the DLL immediately, but delays the DLL until you actually call a function inside the DLL.
Error handling: If you encounter problems when calling a DLL function, an error will be returned (rather than an error when the DLL is loading).

dll := ("")
func := ("GetLastError")
// DLL will be loaded only when func is calledret, _, _ := ()

NewLazyDLL delays loading the DLL until you call a function in the DLL. This is more useful for certain scenarios (such as dynamically determining whether a DLL needs to be loaded).

3. ()

LoadDLL is a general function that loads the specified DLL file. It does not panic on failure, but returns an error.

Error handling: If the DLL fails to load, it returns an error without causing the program to crash. You need to handle the error yourself.

dll, err := ("")
if err != nil {
    ("Error loading DLL:", err)
    return
}

The difference between LoadDLL and MustLoadDLL is that the former returns an error, while the latter will panic directly. Therefore, LoadDLL gives you more control and allows you to handle DLL loading failures as needed.

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