Solution to errors when loading DLL in python

When calling an external DLL file using Python, you may experience load failures. The most common error is OSError.
This problem usually occurs when Python cannot find the DLL file or its dependencies when loading a DLL file using it.

1. Error sample code

Suppose we have a DLL file GYCam_MiniSDK.dll, and we are trying to load it by:

import ctypes

try:
    dll = (r'I:\ligth_software\python\dll\GYCam_MiniSDK.dll')
    print("DLL loaded successfully!")
except OSError as e:
    print(f"loadDLLAn error occurred while: {e}")
    # Further output more error messages    import traceback
    traceback.print_exc()

When running the above code, the system will throw an OSError, prompting that the DLL file cannot be loaded, and the specific error message is:

An error occurred while loading the DLL: Could not find module

2. Solution: Use

After debugging, the problem was solved after replacing it with . is a more general loading method suitable for 32-bit and 64-bit DLL files. Therefore, it is recommended to use it first when you need to load a DLL.

import ctypes

try:
    dll =(r'I:\ligth_software\python\dll\GYCam_MiniSDK.dll',winmode=0)
    print("DLL loaded successfully!")
except OSError as e:
    print(f"loadDLLAn error occurred while: {e}")
    # Further output more error messages    import traceback

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