An application sends a ZGM_GETCOLS to get the number of columns in the ZeeGrid.
ZGM_GETCOLS
wParam = 0; //not used; must be zero
lParam = 0; //not used; must be zero
This message returns the total number of columns in the ZeeGrid.
This message function will return the total number of columns in the ZeeGrid. Columns that have been resized to zero width and non-visible columns as specified in ZGM_DIMGRID are included in the returned value.