Conversion unicode only worked with modificators

[SirJonas]

Hi i am trying to do one program to trigger key's in one game. But my problem is here when i try to convert my key info:

int result = ToUnicodeEx(pKeyboardStruct->vkCode, pKeyboardStruct->scanCode, keyboard_state, buffer,4,0,keyboard_layout);

int result = ToUnicodeEx(pKeyboardStruct->vkCode, pKeyboardStruct->scanCode, keyboard_state, buffer,4,0,keyboard_layout);

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Here i put the steps to get unicode text:

BYTE keyboard_state[256];
GetKeyboardState(keyboard_state);
wchar_t buffer[5];
HKL keyboard_layout = GetKeyboardLayout(0);
    int result = ToUnicodeEx(pKeyboardStruct->vkCode, pKeyboardStruct->scanCode, keyboard_state, buffer,4,0,keyboard_layout);

BYTE keyboard_state[256];
GetKeyboardState(keyboard_state);
wchar_t buffer[5];
HKL keyboard_layout = GetKeyboardLayout(0);
    int result = ToUnicodeEx(pKeyboardStruct->vkCode, pKeyboardStruct->scanCode, keyboard_state, buffer,4,0,keyboard_layout);

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But for some strange reason works with key modificators:

UpdateKeyState(keyboard_state, VK_CONTROL);

UpdateKeyState(keyboard_state, VK_CONTROL);

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But when i put for text only dont do the conversion:

GetKeyboardState(keyboard_state);

GetKeyboardState(keyboard_state);

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So probably for this happen.
For some reason i can't get the unicode text to use in my game.