Simple Sample (C)
This sample illustrates basic SftButton creation in a dialog. It covers registering the button window class, placing a button from a dialog resource, configuring theme and dark-mode behavior, and handling BN_CLICKED notifications.
The source code is located at C:\Program Files (x86)\Softelvdm\SftButton DLL 3.0\Samples\C\Simple\Simple.c or C:\Program Files\Softelvdm\SftButton DLL 3.0\Samples\C\Simple\Simple.c (on 32-bit Windows versions).
/****************************************************************************/
/* SftButton/DLL 3.0 - Button Control for C/C++ */
/* Copyright (C) 2026 Softel vdm, Inc. All Rights Reserved. */
/****************************************************************************/
#include <windows.h>
#include <commctrl.h>
#include "SftButton.h" // SftButton/DLL Header File
#define SFTDARKMODE_IMPLEMENTATION
#include "SftDarkMode.h" // Dark mode support
#include "resource.h" // application resources
/**********************************************************************/
/* Globals */
/**********************************************************************/
HINSTANCE g_hInst; // App Instance Handle
static LPVOID g_pImg1 = NULL; // GDI+ image for Button2 Picture1
static LPVOID g_pImg2 = NULL; // GDI+ image for Button2 Picture2
/**********************************************************************/
/* Main Dialog Proc */
/**********************************************************************/
INT_PTR CALLBACK Main_DialogProc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
INT_PTR dmResult;
switch (msg) {
case WM_INITDIALOG: {
HWND hwndButton1 = GetDlgItem(hwndDlg, IDC_SFTBUTTON1);
HWND hwndButton2 = GetDlgItem(hwndDlg, IDC_SFTBUTTON2);
HWND hwndButton3 = GetDlgItem(hwndDlg, IDC_SFTBUTTON3);
// Set dialog icon
SendMessage(hwndDlg, WM_SETICON, ICON_BIG, (LPARAM)LoadIcon(g_hInst, MAKEINTRESOURCE(IDI_ICON1)));
SendMessage(hwndDlg, WM_SETICON, ICON_SMALL, (LPARAM)LoadIcon(g_hInst, MAKEINTRESOURCE(IDI_ICON1)));
// Apply dark mode to dialog
SftDarkMode_ApplyToDialog(hwndDlg);
// Configure SftButton control 1
{
SFTBUTTON_CONTROL Ctl;
Ctl.cbSize = sizeof(SFTBUTTON_CONTROL);
SftButton_GetControlInfo(hwndButton1, &Ctl);
Ctl.nDarkMode = SFTBUTTON_DARKMODE_AUTO;/* automatic dark mode support */
SftButton_SetControlInfo(hwndButton1, &Ctl);
}
// Configure SftButton control 2
{
SFTBUTTON_CONTROL Ctl;
Ctl.cbSize = sizeof(SFTBUTTON_CONTROL);
SftButton_GetControlInfo(hwndButton2, &Ctl);
Ctl.nDarkMode = SFTBUTTON_DARKMODE_AUTO;/* automatic dark mode support */
Ctl.Text.align = SFT_PICALIGN_LEFT;/* text horizontal alignment */
g_pImg1 = SftButton_LoadGDIPlusImageFromFile(TEXT("Res\\pic_world_48.png"));
if (g_pImg1) Sft_SetPictureGDIPlusImage(&Ctl.Picture1, g_pImg1);
Ctl.Picture1.align = SFT_PICALIGN_CENTER;
Ctl.Picture1.valign = SFT_PICALIGN_VCENTER;
g_pImg2 = SftButton_LoadGDIPlusImageFromFile(TEXT("Res\\pic_go_32.png"));
if (g_pImg2) Sft_SetPictureGDIPlusImage(&Ctl.Picture2, g_pImg2);
Ctl.Picture2.align = SFT_PICALIGN_LEFT;
Ctl.Picture2.valign = SFT_PICALIGN_VCENTER;
SftButton_SetControlInfo(hwndButton2, &Ctl);
}
// Configure SftButton control 3
{
SFTBUTTON_CONTROL Ctl;
Ctl.cbSize = sizeof(SFTBUTTON_CONTROL);
SftButton_GetControlInfo(hwndButton3, &Ctl);
Ctl.fShowDropDown = TRUE;/* show drop-down arrow */
Ctl.nDarkMode = SFTBUTTON_DARKMODE_AUTO;/* automatic dark mode support */
SftButton_SetControlInfo(hwndButton3, &Ctl);
}
CheckDlgButton(hwndDlg, IDC_USE_THEMES, BST_CHECKED);
CheckDlgButton(hwndDlg, IDC_DARK_MODE, SftDarkMode_IsActive() ? BST_CHECKED : BST_UNCHECKED);
return TRUE;
}
case WM_COMMAND:
switch (LOWORD(wParam)) {
case IDCANCEL:
EndDialog(hwndDlg, 0);
return TRUE;
case IDC_SFTBUTTON1:
if (HIWORD(wParam) == BN_CLICKED)
MessageBox(hwndDlg, TEXT("Button 1 clicked!"), TEXT("SftButton/DLL"), MB_OK);
return TRUE;
case IDC_SFTBUTTON2:
if (HIWORD(wParam) == BN_CLICKED)
MessageBox(hwndDlg, TEXT("Button 2 clicked!"), TEXT("SftButton/DLL"), MB_OK);
return TRUE;
case IDC_SFTBUTTON3:
if (HIWORD(wParam) == BN_CLICKED)
MessageBox(hwndDlg, TEXT("Button 3 clicked!"), TEXT("SftButton/DLL"), MB_OK);
else if (HIWORD(wParam) == SFTBUTTONN_DROPDOWNCLICK)
MessageBox(hwndDlg, TEXT("Button 3 drop-down clicked!"), TEXT("SftButton/DLL"), MB_OK);
return TRUE;
case IDC_USE_THEMES:
if (HIWORD(wParam) == BN_CLICKED) {
int useThemes = IsDlgButtonChecked(hwndDlg, IDC_USE_THEMES) == BST_CHECKED
? SFTBUTTON_THEME_YES : SFTBUTTON_THEME_NO;
int ids[] = { IDC_SFTBUTTON1, IDC_SFTBUTTON2, IDC_SFTBUTTON3 };
for (int i = 0; i < (int)(sizeof(ids) / sizeof(ids[0])); ++i) {
HWND hwndBtn = GetDlgItem(hwndDlg, ids[i]);
SFTBUTTON_CONTROL Ctl;
Ctl.cbSize = sizeof(SFTBUTTON_CONTROL);
SftButton_GetControlInfo(hwndBtn, &Ctl);
Ctl.nUseThemes = useThemes;
SftButton_SetControlInfo(hwndBtn, &Ctl);
}
}
return TRUE;
case IDC_DARK_MODE:
if (HIWORD(wParam) == BN_CLICKED) {
BOOL fDark = IsDlgButtonChecked(hwndDlg, IDC_DARK_MODE) == BST_CHECKED;
int btnMode = fDark ? SFTBUTTON_DARKMODE_ON : SFTBUTTON_DARKMODE_OFF;
int ids[] = { IDC_SFTBUTTON1, IDC_SFTBUTTON2, IDC_SFTBUTTON3 };
for (int i = 0; i < (int)(sizeof(ids) / sizeof(ids[0])); ++i)
SftButton_SetDarkMode(GetDlgItem(hwndDlg, ids[i]), btnMode);
SftDarkMode_SetActive(fDark);
SftDarkMode_ApplyToDialog(hwndDlg);
InvalidateRect(hwndDlg, NULL, TRUE);
}
return TRUE;
}
break;
case WM_DESTROY:
// Free GDI+ images now that the control no longer references them.
if (g_pImg1) { SftButton_FreeGDIPlusImageLoadedFromFile(g_pImg1); g_pImg1 = NULL; }
if (g_pImg2) { SftButton_FreeGDIPlusImageLoadedFromFile(g_pImg2); g_pImg2 = NULL; }
break;
case WM_SETTINGCHANGE:
// dark mode handling
if (lParam && lstrcmpW((LPCWSTR)lParam, L"ImmersiveColorSet") == 0) {
SftDarkMode_Init();
SftDarkMode_ApplyToDialog(hwndDlg);
// Forward to the SftButton controls so they can update (AUTO mode)
SendMessage(GetDlgItem(hwndDlg, IDC_SFTBUTTON1), WM_SETTINGCHANGE, wParam, lParam);
SendMessage(GetDlgItem(hwndDlg, IDC_SFTBUTTON2), WM_SETTINGCHANGE, wParam, lParam);
SendMessage(GetDlgItem(hwndDlg, IDC_SFTBUTTON3), WM_SETTINGCHANGE, wParam, lParam);
InvalidateRect(hwndDlg, NULL, TRUE);
}
return TRUE;
}
if (SftDarkMode_HandleDialogMessage(hwndDlg, msg, wParam, lParam, &dmResult))
return dmResult;
return FALSE;
}
/**********************************************************************/
/* WinMain */
/**********************************************************************/
int PASCAL WinMain(HINSTANCE hinst, HINSTANCE hinstPrev, LPSTR lpszCmdLine, int cmdShow)
{
INITCOMMONCONTROLSEX icc;
g_hInst = hinst;
icc.dwSize = sizeof(icc);
icc.dwICC = ICC_WIN95_CLASSES;
InitCommonControlsEx(&icc);
// Register with SftButton/DLL
SftButton_RegisterApp(hinst);
// Initialize dark mode support
SftDarkMode_Init();
DialogBox(hinst, MAKEINTRESOURCE(IDD_MAIN), NULL, Main_DialogProc);
// Unregister from SftButton/DLL
SftButton_UnregisterApp(hinst);
return 0;
}
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