Spinner (Updown) Control Demo

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To create a Spinner (Up-Down) control specify UPDOWN_CLASS as the window class and register the class by specifying the ICC_UPDOWN_CLASS bit flag in the accompanying INITCOMMONCONTROLSEX

#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <commctrl.h>

#pragma comment(lib,"comctl32.lib")

#define ID_UPDOWN 1
#define ID_EDIT   2
#define ID_STATIC 3

#define UD_MAX_POS 30
#define UD_MIN_POS 0

HWND hUpDown;
HWND hEdit;
HWND hStatic;

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
void CreateControls(HWND);

int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
MSG msg;
WNDCLASS wc;
wc.style=CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc=WndProc;
wc.cbClsExtra=0;
wc.cbWndExtra=0;
wc.hInstance=hInstance;
wc.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground=GetSysColorBrush(COLOR_3DFACE);
wc.lpszMenuName=NULL;
wc.lpszClassName=TEXT("Updown control");

RegisterClass(&wc);

CreateWindow(
TEXT("Updown control"),
TEXT("Updown Control"),
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
100,
100,
280,
200,
NULL,
NULL,
hInstance,
NULL);

while(GetMessage(&msg,NULL,0,0))
{
    TranslateMessage(&msg);
    DispatchMessage(&msg);
}

return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd,
                         UINT msg,
                         WPARAM wParam,
                         LPARAM lParam)
{
switch(msg)
{
case WM_CREATE:
    CreateControls(hwnd);
break;

case WM_NOTIFY:
{
    LPNMUPDOWN nm;
    nm=(LPNMUPDOWN)lParam;

    if(nm->hdr.code==UDN_DELTAPOS)
    {
        int value;
        value=nm->iPos + nm->iDelta;
        if(value < UD_MIN_POS)
            value=UD_MIN_POS;

        if(value > UD_MAX_POS)
            value=UD_MAX_POS;

        TCHAR buf[32];
        wsprintf(buf,TEXT("%d"),value);

        SetWindowText(
            hStatic,
            buf);
    }
}

break;

case WM_DESTROY:
    PostQuitMessage(0);
break;

default:
return DefWindowProc(hwnd,msg,wParam,lParam);
}
return 0;
}

void CreateControls(HWND hwnd)
{
INITCOMMONCONTROLSEX icex;
icex.dwSize=sizeof(INITCOMMONCONTROLSEX);
icex.dwICC=ICC_UPDOWN_CLASS;
InitCommonControlsEx(&icex);

// Buddy edit box

hEdit=CreateWindowEx(
WS_EX_CLIENTEDGE,
TEXT("edit"),
TEXT("10"),
WS_CHILD |
WS_VISIBLE |
ES_RIGHT,
15,
15,
70,
25,
hwnd,
(HMENU)ID_EDIT,
GetModuleHandle(NULL),
NULL);

// Spinner control

hUpDown=CreateWindow(
UPDOWN_CLASS,
NULL,
WS_CHILD |
WS_VISIBLE |
UDS_SETBUDDYINT |
UDS_ALIGNRIGHT |
UDS_ARROWKEYS,
0,
0,
120,
120,
hwnd,
(HMENU)ID_UPDOWN,
GetModuleHandle(NULL),
NULL);

// Display value

hStatic=CreateWindow(
TEXT("static"),
TEXT("10"),
WS_BORDER |
WS_CHILD |
WS_VISIBLE |
SS_LEFT,
100,
16,
50,
23,
hwnd,
(HMENU)ID_STATIC,
GetModuleHandle(NULL),
NULL);

// Attach edit box as buddy

SendMessage(
hUpDown,
UDM_SETBUDDY,
(WPARAM)hEdit,
0);

// Set range

SendMessage(
hUpDown,
UDM_SETRANGE,
0,
MAKELPARAM(UD_MAX_POS,UD_MIN_POS));

// Set starting position

SendMessage(
hUpDown,
UDM_SETPOS,
0,
MAKELPARAM(10,0));
}