Visionneuse API Windows

Bonjour à tous,
Voila, je cherche à programmer une visionneuse de fichier .bmp à
partir d'un logiciel que j'ai deja creé (un editeur de texte) :)
Quelqu'un pourrait t'il m'aider a modifier mon code afin de pouvoir
realiser mon projet? :)

#include <windows.h>
#include <stdio.h>

#include "constantes.h"
#include "fonctions.h"

int WINAPI WinMain (HINSTANCE cetteInstance, HINSTANCE
precedenteInstance,
LPSTR lignesDeCommande, int modeDAffichage)
{
HWND hwnd;
MSG message;
WNDCLASS classeFenetre;

instance = cetteInstance;

classeFenetre.style = 0;
classeFenetre.lpfnWndProc = procedureFenetrePrincipale;
classeFenetre.cbClsExtra = 0;
classeFenetre.cbWndExtra = 0;
classeFenetre.hInstance = NULL;
classeFenetre.hIcon = LoadIcon(instance, MAKEINTRESOURCE (2));
classeFenetre.hCursor = LoadCursor(NULL, IDC_ARROW);
classeFenetre.hbrBackground = (HBRUSH)(1 + COLOR_BTNFACE);
classeFenetre.lpszMenuName = "ID_MENU";
classeFenetre.lpszClassName = "classeF";

if(!RegisterClass(&classeFenetre)) return FALSE;

hwnd = CreateWindow("classeF", "Aviator",WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,CW_USEDEFAULT, 800,
600,
NULL, NULL,cetteInstance,
NULL);

if (!hwnd) return FALSE;

ShowWindow(hwnd, modeDAffichage);

while (GetMessage(&message, NULL, 0, 0))
{
TranslateMessage(&message);
DispatchMessage(&message);
}
return message.wParam;
}

et pour mes fonctions:

#include <windows.h>
#include <stdio.h>

#include "constantes.h"
#include "fonctions.h"

LRESULT CALLBACK procedureFenetrePrincipale(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
static BOOL EditNotChg = FALSE;
switch (message)
{

case WM_TIMER:
{
switch (wParam)
case ID_B_TIMER:
DestroyWindow(hstatic);
return 0;
}

case WM_CREATE:
SetTimer(hwnd, ID_B_TIMER, 3000, (TIMERPROC)NULL);

hstatic = CreateWindowEx(WS_EX_TOPMOST ,"STATIC",
"MyPicture",
WS_POPUP | WS_VISIBLE | SS_BITMAP,
300, 250, 450, 300, hwnd,
NULL,
instance, NULL);

hEdit = CreateWindowEx(WS_EX_CLIENTEDGE, "edit", "Texte",
WS_CHILD | WS_VISIBLE | ES_MULTILINE | ES_WANTRETURN |
WS_VSCROLL,
0, 0, 0, 0, hwnd, NULL,
instance, NULL);
hFont = (HFONT)GetStockObject(ANSI_FIXED_FONT);
SendMessage(hEdit,WM_SETFONT,(UINT)hFont,TRUE);
SendMessage(hEdit, EM_SETMARGINS, EC_LEFTMARGIN |
EC_RIGHTMARGIN,

MAKELONG(5, 5));
return 0;

case WM_CLOSE:
if(EditNotChg ||
MessageBox(hwnd,"Voulez-vous vraiment quitter?"
,"Quitter",MB_YESNO | MB_ICONQUESTION ) ==
IDYES)

DestroyWindow(hwnd);
return 0;

case WM_COMMAND:
switch(LOWORD(wParam))
{
case ID_B_APROPOS:
DialogBox(instance, "APROPOS", hwnd,
(DLGPROC)aPropos_procedure);
break;
case ID_B_QUITTER:
if(EditNotChg ||
MessageBox(hwnd,"Voulez-vous vraiment quitter?"
,"Quitter",MB_YESNO | MB_ICONQUESTION ) ==
IDYES)

DestroyWindow(hwnd); SendMessage(hwnd, WM_DESTROY, 0,
0);
break;
case EN_CHANGE:
EditNotChg = FALSE;
break;
case ID_B_OUVRIR:
charger();
break;
}
return 0;

case WM_SIZE:
MoveWindow(hEdit, 0, 0, LOWORD(lParam), HIWORD(lParam),
TRUE);
return 0;

case WM_DESTROY:
PostQuitMessage(0);
return 0;

default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
}

BOOL APIENTRY aPropos_procedure(HWND boiteDeDialogue,UINT
message,WPARAM wParam,LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:

return TRUE;

case WM_COMMAND:
if (LOWORD(wParam) == IDCANCEL || LOWORD(wParam) == IDOK)
{
EndDialog(boiteDeDialogue,0);
return TRUE;
}
return 0;

default:
return FALSE;
}
}

void convert_multiple(char* buf)
{
int i;
for(i=0;;i++)
{
if (buf[i]=='\0')
{
buf[i] = '';
if (buf[i+1]=='\0')
break;
}
}
}

void charger()
{
OPENFILENAME ofn;
CHAR szFile[MAX_PATH]={0};
ZeroMemory(&ofn, sizeof(OPENFILENAME));
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.lpstrFile = szFile;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrFilter =
"Tout les fichiers\0*.*";
ofn.nFilterIndex = 1;
ofn.Flags =
OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST |
OFN_HIDEREADONLY;
if (GetOpenFileName(&ofn)==TRUE)
{
HANDLE hf;
DWORD FileSize,nbcharRead ;
CHAR *buffer;

hf = CreateFile(szFile, GENERIC_READ, 0,NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
NULL);
FileSize = GetFileSize(hf, NULL);
buffer = (PCHAR)LocalAlloc(LMEM_FIXED, FileSize+1);
ReadFile(hf, buffer, FileSize, &nbcharRead, NULL) ;
buffer[FileSize] = 0;
SendMessage(hEdit, WM_SETTEXT, 0, (LPARAM)buffer);
LocalFree(buffer);
CloseHandle(hf);
}
}