error C2065: 'ListDelet' : undeclared identifier

This error typically occurs when the compiler encounters a variable, function, or class name that has not been declared or defined before it is used in the code.

In this case, the error message is indicating that the identifier 'ListDelet' has not been declared before it is used in the code.

To resolve this error, you should check that the identifier 'ListDelet' has been correctly declared before it is used in the code. This may involve checking the spelling of the identifier, ensuring that it has been defined in the correct scope, and verifying that any necessary header files or libraries have been included in the code.