Thread: Multiple instances of form resource

When i create multiple instances of a form resource, strange things happen..
Do i have to create one instance for each(similar) form?
The form comtains comfiguration settings, and has the same fields in all instances, only different data..

Okay:
I have a parent dialog.
In this dialog i create X number of instances of a child form.
These chilkd forms are created by the same function, below is a short example:

Code:

// Creation of child windows
static BOOL CALLBACK DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);
static void InitForm();
static HWND hwThis;


int frmSetup(HWND hWnd, ThData *data, void *tr){
  return((int)CreateDialog(GetModuleHandle(0), MAKEINTRESOURCE(FRM_SETUP), hWnd, DialogProc));
}

It seems that only the last created dialog responds to messages??
I handle the WM_CTLCOLORSTATIC message to draw colored background on some labels. This only happens on the last instance of the form resource.

Does this have anything to do with the fact that DialogProc/hwThis is declared as static?
As i've understood this, the static keyword only means that the variable can't be referenced from other files when it's in the global scope of the file..?