wParam = MAKEWPARAM(0, (iDoc)+1);
lParam = (LPARAM) (LPWSTR) szConfigName;
Specifies the index of the target document. A one-based index should be specified at the higher word of wParam. If 0 is specified at the higher word of wParam, the currently active document will be targeted.
Specifies a buffer that will receive the configuration name. The buffer size must be at least MAX_CONFIG_NAME in words.
The return value is not used.