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- /*-------------------------------------------------------
- KEYLOOK.C -- Displays Keyboard and Character Messages
- (c) Charles Petzold, 1996
- -------------------------------------------------------*/
-
- #include <windows.h>
- #include <stdio.h>
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- RECT rect ;
- int cxChar, cyChar ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- static char szAppName[] = "KeyLook" ;
- HWND hwnd ;
- MSG msg ;
- WNDCLASSEX wndclass ;
-
- wndclass.cbSize = sizeof (wndclass) ;
- wndclass.style = CS_HREDRAW | CS_VREDRAW ;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
- wndclass.hIconSm = LoadIcon (NULL, IDI_APPLICATION) ;
-
- RegisterClassEx (&wndclass) ;
-
- hwnd = CreateWindow (szAppName, "Keyboard Message Looker",
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, iCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- void ShowKey (HWND hwnd, int iType, char *szMessage,
- WPARAM wParam, LPARAM lParam)
- {
- static char *szFormat[2] = { "%-14s %3d %c %6u %4d %3s %3s %4s %4s",
- "%-14s %3d %c %6u %4d %3s %3s %4s %4s" } ;
- char szBuffer[80] ;
- HDC hdc ;
-
- ScrollWindow (hwnd, 0, -cyChar, &rect, &rect) ;
- hdc = GetDC (hwnd) ;
-
- SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
-
- TextOut (hdc, cxChar, rect.bottom - cyChar, szBuffer,
- wsprintf (szBuffer, szFormat [iType],
- szMessage, wParam,
- (BYTE) (iType ? wParam : ' '),
- LOWORD (lParam),
- HIWORD (lParam) & 0xFF,
- (PSTR) (0x01000000 & lParam ? "Yes" : "No"),
- (PSTR) (0x20000000 & lParam ? "Yes" : "No"),
- (PSTR) (0x40000000 & lParam ? "Down" : "Up"),
- (PSTR) (0x80000000 & lParam ? "Up" : "Down"))) ;
-
- ReleaseDC (hwnd, hdc) ;
- ValidateRect (hwnd, NULL) ;
- }
-
- LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
- {
- static char szTop[] =
- "Message Key Char Repeat Scan Ext ALT Prev Tran";
- static char szUnd[] =
- "_______ ___ ____ ______ ____ ___ ___ ____ ____";
- HDC hdc ;
- PAINTSTRUCT ps ;
- TEXTMETRIC tm ;
-
- switch (iMsg)
- {
- case WM_CREATE :
- hdc = GetDC (hwnd) ;
-
- SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
-
- GetTextMetrics (hdc, &tm) ;
- cxChar = tm.tmAveCharWidth ;
- cyChar = tm.tmHeight ;
-
- ReleaseDC (hwnd, hdc) ;
-
- rect.top = 3 * cyChar / 2 ;
- return 0 ;
-
- case WM_SIZE :
- rect.right = LOWORD (lParam) ;
- rect.bottom = HIWORD (lParam) ;
- UpdateWindow (hwnd) ;
- return 0 ;
-
- case WM_PAINT :
- InvalidateRect (hwnd, NULL, TRUE) ;
- hdc = BeginPaint (hwnd, &ps) ;
-
- SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
-
- SetBkMode (hdc, TRANSPARENT) ;
- TextOut (hdc, cxChar, cyChar / 2, szTop, (sizeof szTop) - 1) ;
- TextOut (hdc, cxChar, cyChar / 2, szUnd, (sizeof szUnd) - 1) ;
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_KEYDOWN :
- ShowKey (hwnd, 0, "WM_KEYDOWN", wParam, lParam) ;
- return 0 ;
-
- case WM_KEYUP :
- ShowKey (hwnd, 0, "WM_KEYUP", wParam, lParam) ;
- return 0 ;
-
- case WM_CHAR :
- ShowKey (hwnd, 1, "WM_CHAR", wParam, lParam) ;
- return 0 ;
-
- case WM_DEADCHAR :
- ShowKey (hwnd, 1, "WM_DEADCHAR", wParam, lParam) ;
- return 0 ;
-
- case WM_SYSKEYDOWN :
- ShowKey (hwnd, 0, "WM_SYSKEYDOWN", wParam, lParam) ;
- break ; // ie, call DefWindowProc
-
- case WM_SYSKEYUP :
- ShowKey (hwnd, 0, "WM_SYSKEYUP", wParam, lParam) ;
- break ; // ie, call DefWindowProc
-
- case WM_SYSCHAR :
- ShowKey (hwnd, 1, "WM_SYSCHAR", wParam, lParam) ;
- break ; // ie, call DefWindowProc
-
- case WM_SYSDEADCHAR :
- ShowKey (hwnd, 1, "WM_SYSDEADCHAR", wParam, lParam) ;
- break ; // ie, call DefWindowProc
-
- case WM_DESTROY :
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
- }
-