Run-Time Error - Variable nicht initialisiert????

[Argus Magnus]

Mein Programm sollte beim drücken eines Buttons den Text eines Edit-fields ändern, aber dann:

Run-Time Check Failure #3 - The variable 'textfield_zoom' is being used without being initialized.

Hier der Quellcode:

LRESULT CALLBACK WndProc (HWND fenster, UINT message, WPARAM wParam, LPARAM lParam) 
{ 
HDC hdc; 
PAINTSTRUCT ps;
HWND button_start;
HWND button_end;
HWND button_zoom;
HWND button_unzoom;
HWND button_delete;
HWND textfield_zoom;
HWND textfield_unzoom;
HWND textfield_delete;
int int_zoom;
int int_unzoom;
int int_delete;

switch (message) 
{ 

	case WM_CREATE:
		button_start		= CreateWindow (
											  "button", "START", 
											  WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
											  20, 20, 50, 30, 
											  fenster, (HMENU)1,
											  hInst, NULL
										   ); 
		button_end			= CreateWindow (
											  "button", "END", 
											  WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
											  90, 20, 50, 30,
											  fenster, (HMENU)2,
											  hInst, NULL
										   ); 
		button_zoom			= CreateWindow (
											  "button", "ZOOM", 
											  WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
											  20, 70, 70, 30, 
											  fenster, (HMENU)3,
											  hInst, NULL
										   ); 
		textfield_zoom		= CreateWindow (
											  "edit", "SHIFT", 
											  WS_CHILD | WS_VISIBLE | ES_READONLY, 
											  110, 70, 150, 30, 
											  fenster, NULL,
											  hInst, NULL
										   ); 
		button_unzoom		= CreateWindow (
											  "button", "UNZOOM", 
											  WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
											  20, 120, 70, 30,
											  fenster, (HMENU)4,
											  hInst, NULL
										   ); 
		textfield_unzoom	= CreateWindow (
											  "edit", "ALT", 
											  WS_CHILD | WS_VISIBLE | ES_READONLY, 
											  110, 120, 150, 30, 
											  fenster, NULL,
											  hInst, NULL
										   ); 
		button_delete		= CreateWindow (
											  "button", "DELETE", 
											  WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
											  20, 170, 70, 30,
											  fenster, (HMENU)5,
											  hInst, NULL
										   ); 
		textfield_delete	= CreateWindow (
											  "edit", "BACKSPACE", 
											  WS_CHILD | WS_VISIBLE | ES_READONLY, 
											  110, 170, 150, 30, 
											  fenster, NULL,
											  hInst, NULL
										   ); 
		return 0 ;

	case WM_COMMAND: 
		if(LOWORD(wParam) == 1) 
		{ 
			int c_x,c_y,hs;
			bool i=true;
			long x,y;
			HWND h;
			HDC dc;

			h = FindWindow(NULL,"ioUrbanTerror"); 
			dc = GetDC(h); 
			c_x =800/2;
			c_y=600/2;
			hs=26/2; 
			while(i==true) { 
				if(GetAsyncKeyState(0x08)) { 
					i=false;
				} 
				if(GetAsyncKeyState(VK_SHIFT)) { 
					hs=600/2;
				} 
				if(GetAsyncKeyState(0x01)) { 
					hs=26/2;
				} 
				if(GetAsyncKeyState(VK_MENU)) {
					hs=26/2;
				}
				for(x=c_x-hs;x<c_x+hs;x++) { 
					SetPixel(dc,x,c_y,RGB(255,0,0)); 
				} 
				for(y=c_y-hs;y<c_y+hs;y++) { 
					SetPixel(dc,c_x,y,RGB(255,0,0)); 
				} 
				Sleep(5); 
			} 
			ReleaseDC(h, dc); 
		} 
		if(LOWORD(wParam) == 2) 
		{ 
			PostQuitMessage(0);
		} 
		if(LOWORD(wParam) == 3) 
		{ 
			SetWindowText(textfield_zoom,"Taste drücken...");
		} 
		if(LOWORD(wParam) == 4) 
		{ 
			SetWindowText(textfield_unzoom,"Taste drücken...");
		} 
		if(LOWORD(wParam) == 5) 
		{ 
			SetWindowText(textfield_delete,"Taste drücken...");
		} 
		return 0;

	case WM_DESTROY: 
		PostQuitMessage(0);  
		return 0; 
} 

return DefWindowProc (fenster, message, wParam, lParam); 
}

Ich weiss nicht ob ich blind bin, aber ich seh den Fehler einfach nicht, hoffe einer von euch Pros findet ein bisschen zeit für mich

[Badestrand]

Du solltest den Lebensbereich einer Variablen beachten, bei jedem Funktionsaufruf sind die lokalen Variablen wieder unbelegt.

[Argus Magnus]

ich danke dir