Create trackbar.c

controls/trackbar.c

@@ -0,0 +1,94 @@
+#include <windows.h>
+#include <commctrl.h>
+
+LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
+void CreateControls(HWND hwnd);
+void UpdateLabel(void);
+
+HWND hTrack;
+HWND hlbl;
+
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, 
+  PWSTR lpCmdLine, int nCmdShow) {
+  
+    HWND hwnd;
+    MSG  msg ;
+
+    WNDCLASSW wc = {0};
+    wc.lpszClassName = L"Trackbar";
+    wc.hInstance     = hInstance;
+    wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
+    wc.lpfnWndProc   = WndProc;
+    wc.hCursor       = LoadCursor(0,IDC_ARROW);
+  
+    RegisterClassW(&wc);
+    hwnd = CreateWindowW(wc.lpszClassName, L"Trackbar", 
+        WS_OVERLAPPEDWINDOW | WS_VISIBLE, 100, 100, 350, 180, 0, 0, hInstance, 0);
+  
+    while (GetMessage(&msg, NULL, 0, 0)) {
+    
+        TranslateMessage(&msg);
+        DispatchMessage(&msg);
+    }
+
+    return (int) msg.wParam;
+}
+
+LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, 
+  WPARAM wParam, LPARAM lParam) {
+  
+  switch(msg) {
+  
+     case WM_CREATE:
+       CreateControls(hwnd);
+       break;
+
+     case WM_HSCROLL:
+       UpdateLabel();
+       break;
+
+     case WM_DESTROY:
+       PostQuitMessage(0);
+       break; 
+  }
+
+  return DefWindowProcW(hwnd, msg, wParam, lParam);
+}
+
+void CreateControls(HWND hwnd) {
+
+    HWND hLeftLabel = CreateWindowW(L"Static", L"0", 
+        WS_CHILD | WS_VISIBLE, 0, 0, 10, 30, hwnd, (HMENU)1, NULL, NULL);
+
+    HWND hRightLabel = CreateWindowW(L"Static", L"100", 
+        WS_CHILD | WS_VISIBLE, 0, 0, 30, 30, hwnd, (HMENU)2, NULL, NULL);
+
+    hlbl = CreateWindowW(L"Static", L"0", WS_CHILD | WS_VISIBLE, 
+        270, 20, 30, 30, hwnd, (HMENU)3, NULL, NULL);
+
+    INITCOMMONCONTROLSEX icex;
+
+    icex.dwSize = sizeof(INITCOMMONCONTROLSEX);
+    icex.dwICC  = ICC_LISTVIEW_CLASSES;
+    InitCommonControlsEx(&icex); 
+
+    hTrack = CreateWindowW(TRACKBAR_CLASSW, L"",
+        WS_CHILD | WS_VISIBLE | TBS_AUTOTICKS,
+        20, 20, 170, 30, hwnd, (HMENU) 3, NULL, NULL);
+
+    SendMessageW(hTrack, TBM_SETRANGE,  TRUE, MAKELONG(0, 100)); 
+    SendMessageW(hTrack, TBM_SETPAGESIZE, 0,  10); 
+    SendMessageW(hTrack, TBM_SETTICFREQ, 10, 0); 
+    SendMessageW(hTrack, TBM_SETPOS, FALSE, 0); 
+    SendMessageW(hTrack, TBM_SETBUDDY, TRUE, (LPARAM) hLeftLabel); 
+    SendMessageW(hTrack, TBM_SETBUDDY, FALSE, (LPARAM) hRightLabel); 
+}
+
+void UpdateLabel(void) {
+
+    LRESULT pos = SendMessageW(hTrack, TBM_GETPOS, 0, 0);
+    wchar_t buf[4];
+    wsprintfW(buf, L"%ld", pos);
+
+    SetWindowTextW(hlbl, buf);
+}