Re: MoveWindow not sending WM_SIZE on deeply nested windows

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Hi Christian,

Please forgive my ignorance, but I am not sure what "second bug" you are
referring. What do you mean "all "default_parent" stuff must be removed"?
However, I have removed all the "default_parent" and change for (i = 0; i
<= MAX_COUNT; i++) to for (i = 0; i < MAX_COUNT; i++) , but I still get
the error at 48,

Below is the modified code sinppet, please feel free to point out whatever
I overlooked:

#include "stdafx.h"
#include<stdio.h>

HINSTANCE hInst;
HWND top_window; // Top window handle.
HWND lastHwnd; // Last created window handle

#define szWindowClass "WINDOW"
#define szTopWindowClass "TOP_WINDOW"
#define MAX_COUNT 100
HWND Hwnds[MAX_COUNT];
int windowCount;

extern LRESULT CALLBACK window_procedure (HWND, UINT, WPARAM, LPARAM);

void display_error () {
LPVOID lpMsgBuf;
CHAR szBuf[5120]; DWORD dw = GetLastError();
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0,
NULL
);
sprintf(szBuf, "%s\nGetLastError returned %u\n", lpMsgBuf, dw);
MessageBox( NULL, szBuf, "Error", MB_OK | MB_ICONINFORMATION );
LocalFree( lpMsgBuf );
}

ATOM register_class (LPTSTR a_class)
{
WNDCLASSEX wcex;

wcex.cbSize = sizeof(WNDCLASSEX);

wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)window_procedure ;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInst;
wcex.hIcon = NULL;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = a_class;
wcex.hIconSm = NULL;

return RegisterClassEx(&wcex);
}

void add_widget ()
{
HWND hwnd, last_parent;


hwnd = CreateWindowEx(WS_EX_CONTROLPARENT, szWindowClass, "Child window",
WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_VISIBLE,
0, 0, 1200, 1200, top_window, 0, hInst, NULL);

if (!hwnd) {
display_error ();
}
Hwnds[windowCount++]= hwnd;


if (!lastHwnd) {
last_parent = SetParent (hwnd, top_window);
} else {
last_parent = SetParent (hwnd, lastHwnd);
}

if (!last_parent) {
display_error ();
}

ShowWindow (hwnd, SW_SHOWDEFAULT);
UpdateWindow (hwnd);
lastHwnd = hwnd;
}

BOOL init ()
{
HWND hwnd;

top_window = CreateWindow(szTopWindowClass, "Test", WS_OVERLAPPEDWINDOW,
0, 0, CW_USEDEFAULT, 0, NULL, NULL, hInst, NULL);

if (!top_window) {
display_error ();
return FALSE;
}

ShowWindow(top_window, SW_SHOW);
UpdateWindow(top_window);

return TRUE;
}


int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR
lpCmdLine, int nCmdShow)
{
MSG msg;
int i;

hInst = hInstance;

if (!register_class (szWindowClass)) {
display_error ();
return FALSE;
}

if (!register_class (szTopWindowClass)) {
display_error ();
return FALSE;
}

if (!init ()) {
display_error ();
return FALSE;
}

for (i = 0; i < MAX_COUNT; i++) {
add_widget ();
}

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

return 0;
}

LRESULT CALLBACK window_procedure (HWND hwnd, UINT message, WPARAM wParam,
LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
int i;

switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
EndPaint(hwnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}

Thanks!

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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