2023/9/21 11:03:44 am
m_listCtrl !=NULL has multiple operators matching the operands
2023/9/21 11:04:00 am
If you encounter the error "M_listCtrl != NULL has multiple operators matching operands" when compiling or running your code, this is usually due to one of the following reasons:
Incorrect use of operators: In conditional judgment statements, double equal signs (==) should be used for equality comparisons instead of single equal signs (=) for assignment operations. The correct judgment statement should be m_listCtrl != NULL.
Missing header file: If the NULL macro definition is used but the relevant header file is not included, the compiler may not be able to correctly parse the definition of NULL. Please make sure you include the correct header files in your code, such as #include or #include.
Declaration problem: If m_listCtrl is not declared or initialized before using it, the compiler will not recognize the variable. Please check that m_listCtrl is declared and initialized correctly.
Scope problem: If m_listCtrl cannot be accessed in the current scope, it may be because there is a problem with the scope of the variable. Make sure the variables are properly scoped and accessed where needed.
Please review and correct the code on a case-by-case basis to resolve this error. If the issue persists, please provide more relevant code and error information so that we can better help you resolve the issue.
2023/9/21 3:17:40 pm
creectrl mouse scrolls when the mouse moves to a child node
2023/9/21 3:17:46 pm
To implement mouse scrolling on CTreeCtrl child nodes, you can do the following steps:
First, make sure that the corresponding message handling mechanism has been enabled for the CTreeCtrl control. You can add the following message mapping in the dialog class or window class where CTreeCtrl is located