Имена параметров функций

/*main.h*|
BOOL CALLBACK DlgProc(HWND,UINT,WPARAM,LPARAM);
void DlgOnCommand(HWND,int,HWND,UINT);
BOOL DlgOnInitDialog(HWND,HWND,LPARAM);

/*main.rc*|
File Dialog 40,20,130,100
CAPTION "Programma 10-1"
 BEGIN
 END

#include <windows.h>
#include <windowsx.h>
#include "main.h"
#include <commctrl.h>
HINSTANCE hInstance;
 
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR, int){
    hInstance=hInst;
    InitCommonControls();
    DialogBox(hInst,"Files",NULL,DlgProc);
    return 0;
    }
 
BOOL CALLBACK DlgProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam){
    switch(msg){
    HANDLE_MSG(hwnd,WM_INITDIALOG,DlgOnInitDialog);
    HANDLE_MSG(hwnd,WM_COMMAND,DlgOnCommand);
    default:
        return FALSE;
        }
    }
 
BOOL DlgOnInitDialog(HWND hwnd, HWND, LPARAM)
    {
    char szName[]="Imia faila";
    char szSize[]="Razmer faila";
    char szFileName[80];
    char szFileSize[10];
    HANDLE hFile,hOpenFile;
    DWORD dwFileSize;
    int nItemIndex=0;
    
    HWND hwndList=CreateWindowEx(0,WC_LISTVIEW,NULL,WS_CHILD|WS_BORDER|WS_VISIBLE|LVS_REPORT,
        20,15,222,150, hwnd,NULL,hInstance,NULL);
 
    LV_COLUMN lvc;
    ZeroMemory(&lvc,sizeof(lvc));
    lvc.mask=LVCF_FMT|LVCF_SUBITEM|LVCF_TEXT|LVCF_WIDTH;
    lvc.fmt=LVCFMT_LEFT;
    lvc.cx=115;
    lvc.pszText=szName;
    ListView_InsertColumn(hwndList,0,&lvc);
    lvc.cx=90;
    lvc.pszText=szSize;
    ListView_InsertColumn(hwndList,1,&lvc);
    
    LV_ITEM lvi;
    ZeroMemory(&lvi,sizeof(lvi));
    lvi.mask=LVIF_TEXT;
    lvi.pszText=szFileName;
 
    WIN32_FIND_DATA fd;
    hFile=FindFirstFile("*.*",&fd);
    if(hFile==INVALID_HANDLE_VALUE)
        return TRUE;
    else{
        hOpenFile=CreateFile(fd.cFileName,GENERIC_READ,0,0,OPEN_EXISTING,0,NULL);
        if(hOpenFile==INVALID_HANDLE_VALUE)
    dwFileSize=0;
    else{
        dwFileSize=GetFileSize(hOpenFile,NULL);
        CloseHandle(hOpenFile);
        }
    wsprintf(szFileSize,"%d",dwFileSize);
    strcpy(szFileName,fd.cFileName);
    lvi.iItem=nItemIndex;
    ListView_InsertItem(hwndList,&lvi);
    ListView_SetItemText(hwndList,nItemIndex,1,szFileSize);
    nItemIndex++;
    }
 
while(FindNextFile(hFile,&fd)){
    hOpenFile=CreateFile(fd.cFileName,GENERIC_READ,0,0,OPEN_EXISTING,0,NULL);
    if(hOpenFile==INVALID_HANDLE_VALUE)
        dwFileSize=0;
    else{
        dwFileSize=GetFileSize(hOpenFile,NULL);
        CloseHandle(hOpenFile);
        }
    wsprintf(szFileSize,"%d",dwFileSize);
    strcpy(szFileName,fd.cFileName);
    lvi.iItem=nItemIndex;
    ListView_InsertItem(hwndList,&lvi);
    ListView_SetItemText(hwndList,nItemIndex,1,szFileSize);
nItemIndex++;
}
return TRUE;
}
void DlgOnCommand(HWND hwnd,int id, HWND, UINT) {
switch(id){
case IDCANCEL:
EndDialog(hwnd,0);
}
}