c++ winapi impossible to create 2 controls - c++

Question

I'm trying to create window that contain richedit control and listbox control,
the problem is that the second control which I create, doesn't show up.
I mean:
case WM_CREATE: // In main window procedure
{
/* Center the main window */
This->CenterWindow(hwnd);
/* Initialize the clients list */
This->InitListClients(hwnd);
/* Initialize the server log */
This->InitEditLog(hwnd);
return 0;
}
If InitListClients function will be first, only the listbox will show up,
if InitEditLog will be first, only the richedit will show up.
Here are the functions:
void ApostleServer::InitEditLog(HWND &_hwnd)
{
LoadLibrary(TEXT("Riched32.dll"));
hEditLog = CreateWindowEx(WS_EX_STATICEDGE, "richedit", "bla", WS_CHILD | WS_VISIBLE | ES_MULTILINE, 10, 10, 390, 310, _hwnd, NULL, (HINSTANCE)GetWindowLong(_hwnd, GWL_HINSTANCE), NULL);
}
void ApostleServer::InitListClients(HWND &_hwnd)
{
hListClients = CreateWindowEx(WS_EX_STATICEDGE, "listbox", "bla", WS_CHILD | WS_VISIBLE | LBS_NOTIFY, 550, 20, 150, 150, _hwnd, NULL, (HINSTANCE)GetWindowLong(_hwnd, GWL_HINSTANCE), NULL);
}
I'm kinda newbie with winapi and I couldn't find solution for this problem.
Thanks.
EDIT:
As I commented, the cause of the problem is the use of class members.
Here is a whole code that I've wrote and has the same problem:
#include <Windows.h>
#include <stdlib.h>
class Server
{
public:
/* Fields */
MSG* msg;
WNDCLASSW* wc;
HWND hListClients;
HWND hEditLog;
/* Methods */
void InitEditLog(HWND &_hwnd)
{
LoadLibrary(TEXT("Riched32.dll"));
hEditLog = CreateWindowExW(WS_EX_STATICEDGE, L"richedit", L"Text", WS_CHILD | WS_VISIBLE | ES_MULTILINE, 10, 10, 390, 306, _hwnd, (HMENU)2, (HINSTANCE)GetWindowLong(_hwnd, GWL_HINSTANCE), NULL);
}
void InitListClients(HWND &_hwnd)
{
// Here I'm using hListClients class member, and that what cause the problem (I will see only the list on the window)
hListClients = CreateWindowExW(WS_EX_STATICEDGE, L"listbox", L"asd", WS_CHILD | WS_VISIBLE | LBS_NOTIFY, 410, 10, 160, 306, _hwnd, (HMENU)1, (HINSTANCE)GetWindowLong(_hwnd, GWL_HINSTANCE), NULL);
// If I was only creating the listbox (without returning handler), I will see the listbox and the richedit.
}
static LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
Server* This = (Server*)GetWindowLongW(hwnd, GWL_USERDATA);
switch(msg)
{
case WM_CREATE:
{
/* Initialize the clients list */
This->InitListClients(hwnd); // Attention that I called this function first.
/* Initialize the server log */
This->InitEditLog(hwnd);
// If I would call this function first, I will see only the richedit.
return 0;
}
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}
}
return DefWindowProcW(hwnd, msg, wParam, lParam);
}
Server(HINSTANCE &_hInstance)
{
msg = new MSG;
wc = new WNDCLASSW;
wc->style = CS_HREDRAW | CS_VREDRAW;
wc->cbClsExtra = 0;
wc->cbWndExtra = 0;
wc->lpszClassName = L"ApostleServer";
wc->hInstance = _hInstance;
wc->hbrBackground = GetSysColorBrush(COLOR_3DFACE);
wc->lpszMenuName = NULL;
wc->lpfnWndProc = WndProc;
wc->hCursor = LoadCursor(NULL, IDC_ARROW);
wc->hIcon = LoadIcon(NULL, IDI_APPLICATION);
RegisterClassW(&(*wc));
CreateWindowW(wc->lpszClassName, L"Apostle Server", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 100, 100, 600, 400, 0, 0, _hInstance, 0);
while(GetMessage(&(*msg), NULL, 0, 0))
{
TranslateMessage(&(*msg));
DispatchMessage(&(*msg));
}
}
};
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow)
{
Server* srvr = new Server(hInstance);
return 0;
}

Answer 1

Problem solved by creating the controls on WM_CREATE message (but not to set control handlers!), and set the control handlers after the creation of the main window.
WM_CREATE message:
case WM_CREATE:
{
/* Center the main window */
This->CenterWindow(hwnd);
/* Initialize the clients list */
This->InitListClients(hwnd);
/* Initialize the server log */
This->InitEditLog(hwnd);
return 0;
}
After main window creation:
RegisterClassW(&(*wc));
hMainWindow = CreateWindowW(wc->lpszClassName, L"Apostle Server", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 100, 100, 600, 400, 0, 0, _hInstance, 0);
/* Set controls handlers */
hListClients = GetDlgItem(hMainWindow, IDC_LISTCLIENTS);
hEditLog = GetDlgItem(hMainWindow, IDC_EDITLOG);
InitEditLog and InitListClients functions:
void ApostleServer::InitEditLog(HWND &_hwnd)
{
LoadLibrary(TEXT("Riched32.dll"));
CreateWindowExW(WS_EX_STATICEDGE, L"richedit", L"Text", WS_CHILD | WS_VISIBLE | ES_MULTILINE, 10, 10, 390, 306, _hwnd, (HMENU)IDC_EDITLOG, (HINSTANCE)GetWindowLong(_hwnd, GWL_HINSTANCE), NULL);
}
void ApostleServer::InitListClients(HWND &_hwnd)
{
CreateWindowExW(WS_EX_STATICEDGE, L"listbox", L"asd", WS_CHILD | WS_VISIBLE | LBS_NOTIFY, 410, 10, 160, 306, _hwnd, (HMENU)IDC_LISTCLIENTS, (HINSTANCE)GetWindowLong(_hwnd, GWL_HINSTANCE), NULL);
}