In the MFC split window, setcolumninfo failed.

Create a window dynamic split in the oncreateclient function and change the window size in onszie.

After debugging, find:

M_pcolinfo [col]. nidealsize = cxideal;

Here, the m_pcolinfo Pointer Points to 0x0000000000, which indicates that the pointer location is incorrect. It may be that the onsize is called before oncreateclient is called, resulting in an incorrect access location.

Therefore, you can set a bool variable to true after oncreateclient. When this bool is true, the setcolumninfo function is called in onsize.