CONVERTISSEUR EURO EN WIN32 (VC++)

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

LRESULT CALLBACK EuroView(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance,
				   HINSTANCE hPrevInstance,
				   LPSTR lpCmdLine,
				   int nCmdShow)
{
	/* Ouverture de la boite de dialogue */
	DialogBox(hInstance, (LPCTSTR)IDD_EURO, NULL, (DLGPROC)EuroView);
	return 0;
}

LRESULT CALLBACK EuroView(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
	/* iSens : Definit le sens de conversion 1 */
	/* 1 : Francs -> Euros */
	/* 2 : Euros -> Francs */
	static short iSens;
	static char sBuffer[20];
	static double dChange, dResult;

	switch(iMsg)
	{
	case WM_INITDIALOG:
		iSens = 1;
		SetDlgItemText(hDlg, IDC_M1, NULL);
		SetDlgItemText(hDlg, IDC_M2, NULL);
		SetFocus(GetDlgItem(hDlg, IDC_M1));
		break;
	case WM_COMMAND:
		switch(HIWORD(wParam))
		{
		/* On clic sur un bouton */
		case BN_CLICKED:
			switch(LOWORD(wParam))
			{
			case ID_QUIT:
				PostQuitMessage(0);
			/* Demande conversion Francs -> Euros */
			case IDC_FR_EU:
				if(iSens == 0)
				{
					SetDlgItemText(hDlg, IDC_MONNAIE1, "Franc(s)");
					SetDlgItemText(hDlg, IDC_MONNAIE2, "?uro(s)");
					SetDlgItemText(hDlg, IDC_M1, NULL);
					SetDlgItemText(hDlg, IDC_M2, NULL);
					SetFocus(GetDlgItem(hDlg, IDC_M1));
					iSens = 1;
				}
				break;
			/* Demande conversion Euros -> Francs */
			case IDC_EU_FR:
				if(iSens == 1)
				{
					SetDlgItemText(hDlg,IDC_MONNAIE1,"?uro(s)");
					SetDlgItemText(hDlg,IDC_MONNAIE2,"Franc(s)");
					SetDlgItemText(hDlg, IDC_M1, NULL);
					SetDlgItemText(hDlg, IDC_M2, NULL);
					SetFocus(GetDlgItem(hDlg, IDC_M1));
					iSens = 0;
				}
				break;
			}
		/* On modifie la valeur a convertir */
		case EN_CHANGE:
			switch(LOWORD(wParam))
			{
			case IDC_M1:
				GetDlgItemText(hDlg, IDC_M1, sBuffer, 15);
				sscanf(sBuffer, "%lf", &dChange);

				if (iSens == 1)
					dResult = dChange / 6.55957;
				else
					dResult = dChange * 6.55957;

				sprintf(sBuffer, "%0.2f", dResult);
				SetDlgItemText(hDlg, IDC_M2, sBuffer);
				break;
			}
		}
	}
	return FALSE;
}