Page 77 - DCAP408_WEB_PROGRAMMING

Unit 4: Windows Controls

Automatically Handling Scroll Bars Notes

1. To create a small editor with its scroll bars, modify the procedure as follows:
LRESULT CALLBACK WndProcedure(HWND hWnd, UINT Msg,
WPARAM wParam, LPARAM lParam)
{
static HWND hWndEdit;

switch(Msg)

{
case WM_CREATE:

hWndEdit = CreateWindow(“EDIT”, // We are creating an Edit
control
NULL, // Leave the control empty
WS_CHILD | WS_VISIBLE | WS_HSCROLL |

WS_VSCROLL | ES_LEFT |
ES_MULTILINE |
ES_AUTOHSCROLL | ES_AUTOVSCROLL,
0, 0, 0, 0, // Let the WM_SIZE
message below take care of the size
hWnd,

0,
hInst,
NULL);

return 0;

case WM_SETFOCUS:
SetFocus(hWndEdit);
return 0;

case WM_SIZE:
MoveWindow(hWndEdit, 0, 0, LOWORD(lParam), HIWORD(lParam),
TRUE);
return 0;

case WM_DESTROY:
// If the user has finished, then close the window

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